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#1 2026-06-12 23:38:08
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Connection issues with Marshall Major IV headphones
I had no problems for months until i did a kernel update around christmas 2025. Ever since, i get various failures when connecting, such as timeout, low RSSI and authentication failure. I wrote a script that somehow fixed the issue temporarily, but now that one doesn't even work anymore. Here's the script, if that matters:
#!/bin/bash
bluetoothctl <<EOF
scan off
disconnect 1C:6E:4C:AD:33:ED
remove 1C:6E:4C:AD:33:ED
EOF
echo "Perform a factory reset on the Major IV headphones"
read
sudo systemctl restart bluetooth
systemctl restart --user pipewire
systemctl restart --user pipewire-pulse
systemctl restart --user wireplumber
bluetoothctl <<EOF
power on
discoverable on
pairable on
agent KeyboardDisplay
default-agent
scan on
connect 1C:6E:4C:AD:33:ED
EOF`1C:6E:4C:AD:33:ED` is the ID of my bluetooth headset (Marshall Major IV). For those who want to try the script, change the bluetooth-ID to whatever your device has. The script kinda fails at the connect step, but i remember it worked once when i wrote it the first time. For those with similar problems, it might be worth trying.
It seems to occasionally perform the first step or so of the connection process, but tends to fail at some point, where the computer and the headset tend to disagree on whether or not they are connected, and then a timeout occurs. Something like that. If not, i get a low RSSI error, authentication failure, or br-connection-key-missing. I'm not entirely sure why.
Apparently this thing's firmware can be updated. I need an app for that on my phone, which doesn't even work. The app doesn't find the headset, so i guess that's out of the question. (unless someone knows a solution. I don't know.)
I've tried resetting my `/etc/bluetooth` configuration, but it didn't help. Now i really don't know what to do. This is a major source of frustration. At least it supports a headphone jack.
My laptop is an old HP Elitebook 8560w. Maybe the old hardware is a cause? I've heard others have had problems with bluetooth around the same time, so i'm wondering if there was a breaking change in the firmware or bluez or something along those lines at that point. Or maybe not. Does anyone know? Any help/advice appreciated.
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#2 2026-06-12 23:43:54
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
For the record, the headphones work fine with my android phone. No problems, except for the Marshall bluetooth app, which is supposed to be able to update its firmware (but it won't find the headset even if i'm connected to it through bluetooth). Anyways, the headphones seem to work fine with my phone. Not my laptop running arch-linux. It used to work for a bout a year until it suddenly stopped working after i did an update.
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#3 2026-06-12 23:46:53
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
I also suspect the issue might be related to pipewire. Sometimes i'm able to connect, but pipewire seems to be confused about what audio output to assign the device. Then it stays connected for a few seconds, and then times out after a while with no audio sink created.
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#4 2026-08-02 19:28:26
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
Still having problems with this.
`info` in `bluetoothctl` before it disconnects gives me:
Device 1C:6E:4C:AD:33:ED (public)
Name: MAJOR IV
Alias: MAJOR IV
Class: 0x00240418 (2360344)
Icon: audio-headphones
Paired: no
Bonded: no
Trusted: yes
Blocked: no
Connected: yes
LegacyPairing: no
CablePairing: no
UUID: Advanced Audio Distribu.. (0000110d-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Cont.. (0000110f-0000-1000-8000-00805f9b34fb)
UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: Headset HS (00001131-0000-1000-8000-00805f9b34fb)
Modalias: bluetooth:v000ApFFFFdFFFFWhen it disconnects i get the following output:
Failed to connect: org.bluez.Error.Failed br-connection-canceled
[SIGNAL] BREDR.Disconnected - org.bluez.Reason.Timeout, Connection timeout
[SIGNAL] Disconnected - org.bluez.Reason.Timeout, Connection timeout
[CHG] Device 1C:6E:4C:AD:33:ED Connected: no
[CHG] Device 1C:6E:4C:AD:33:ED Connected: yes
[SIGNAL] BREDR.Disconnected - org.bluez.Reason.Timeout, Connection timeout
[SIGNAL] Disconnected - org.bluez.Reason.Timeout, Connection timeout
[CHG] Device 1C:6E:4C:AD:33:ED Connected: no
[CHG] Device 1C:6E:4C:AD:33:ED Connected: yes
[SIGNAL] BREDR.Disconnected - org.bluez.Reason.Timeout, Connection timeout
[SIGNAL] Disconnected - org.bluez.Reason.Timeout, Connection timeout
[CHG] Device 1C:6E:4C:AD:33:ED Connected: noLast edited by sigurd4 (2026-08-02 19:29:41)
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#5 2026-08-02 22:35:08
- killertofus
- Member
- Registered: 2025-02-10
- Posts: 217
Re: Connection issues with Marshall Major IV headphones
I Have Linux Perl Can i Download Gnome???
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#6 2026-08-10 19:46:08
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
I tried `btmon` to see what happens when i try to connect. Here is the output:
Bluetooth monitor ver 5.87
btmon[276442]: = Note: Linux version 7.1.6-arch1-1 (x86_64) 0.060624
btmon[276442]: = Note: Bluetooth subsystem version 2.22 0.060627
= New Index: 40:2C:F4:D7:10:A1 (Primary,USB,hci0) [hci0] 0.060628
= Open Index: 40:2C:F4:D7:10:A1 [hci0] 0.060629
= Index Info: 40:2C:F4:D7:10:A1 (Broadcom Corporation) [hci0] 0.060629
bluetoothd[1714]: @ MGMT Open: bluetoothd (privileged) version 1.23 {0x0001} 0.060630
bluetoothd[1714]: @ MGMT Command: Add Device (0x0033) plen 8 {0x0001} [hci0] 3.429037
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Action: Allow incoming connection (0x01)
@ MGMT Event: Device Flags Changed (0x002a) plen 15 {0x0001} [hci0] 3.429052
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Supported Flags: 0x00000001
Remote Wakeup
Current Flags: 0x00000000
@ MGMT Event: Command Complete (0x0001) plen 10 {0x0001} [hci0] 3.429055
Add Device (0x0033) plen 7
Status: Success (0x00)
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
bluetoothd[1714]: @ MGMT Command: Stop Discovery (0x0024) plen 1 {0x0001} [hci0] 3.429148
Address type: 0x01
BR/EDR
< HCI Command: Inquiry Cancel (0x01|0x0002) plen 0 #1 [hci0] 3.429185
> HCI Event: Command Complete (0x0e) plen 4 #2 [hci0] 3.431635
Inquiry Cancel (0x01|0x0002) ncmd 1
Status: Success (0x00)
@ MGMT Event: Discovering (0x0013) plen 2 {0x0001} [hci0] 3.431768
Address type: 0x01
BR/EDR
Discovery: Disabled (0x00)
@ MGMT Event: Command Complete (0x0001) plen 4 {0x0001} [hci0] 3.431842
Stop Discovery (0x0024) plen 1
Status: Success (0x00)
Address type: 0x01
BR/EDR
bluetoothd[1714]: @ MGMT Command: Pair Device (0x0019) plen 8 {0x0001} [hci0] 3.439577
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Capability: KeyboardDisplay (0x04)
< HCI Command: Create Connection (0x01|0x0005) plen 13 #3 [hci0] 3.439710
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow peripheral (0x01)
> HCI Event: Command Status (0x0f) plen 4 #4 [hci0] 3.441736
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #5 [hci0] 4.920758
Status: Success (0x00)
Handle: 12
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #6 [hci0] 4.921060
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
btmon[276442]: @ RAW Open: btmon (privileged) version 2.22 {0x0002} 4.921417
btmon[276442]: @ RAW Close: btmon {0x0002} 4.921428
> HCI Event: Command Status (0x0f) plen 4 #7 [hci0] 4.923667
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11 #8 [hci0] 4.924657
Status: Success (0x00)
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Features[0/0][8]:
ff fe 8f fe db ff 5b 87 ......[.
3 slot packets
5 slot packets
Encryption
Slot offset
Timing accuracy
Role switch
Hold mode
Sniff mode
Power control requests
Channel quality driven data rate (CQDDR)
SCO link
HV2 packets
HV3 packets
u-law log synchronous data
A-law log synchronous data
CVSD synchronous data
Paging parameter negotiation
Power control
Transparent synchronous data
Broadcast Encryption
Enhanced Data Rate ACL 2 Mbps mode
Enhanced Data Rate ACL 3 Mbps mode
Enhanced inquiry scan
Interlaced inquiry scan
Interlaced page scan
RSSI with inquiry results
Extended SCO link (EV3 packets)
EV4 packets
EV5 packets
AFH capable peripheral
AFH classification peripheral
LE Supported (Controller)
3-slot Enhanced Data Rate ACL packets
5-slot Enhanced Data Rate ACL packets
Sniff subrating
Pause encryption
AFH capable central
AFH classification central
Enhanced Data Rate eSCO 2 Mbps mode
Enhanced Data Rate eSCO 3 Mbps mode
3-slot Enhanced Data Rate eSCO packets
Extended Inquiry Response
Simultaneous LE and BR/EDR (Controller)
Secure Simple Pairing
Encapsulated PDU
Non-flushable Packet Boundary Flag
Link Supervision Timeout Changed Event
Inquiry TX Power Level
Enhanced Power Control
Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #9 [hci0] 4.924704
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1
> HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 #10 [hci0] 4.925626
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R1 (0x01)
> HCI Event: Max Slots Change (0x1b) plen 3 #11 [hci0] 4.926626
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Max slots: 5
> HCI Event: Command Status (0x0f) plen 4 #12 [hci0] 4.928664
Read Remote Extended Features (0x01|0x001c) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Extended Features (0x23) plen 13 #13 [hci0] 4.939634
Status: Success (0x00)
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1/2
Features[1/0][8]:
03 00 00 00 00 00 00 00 ........
Secure Simple Pairing (Host Support)
LE Supported (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10 #14 [hci0] 4.939711
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
> HCI Event: Command Status (0x0f) plen 4 #15 [hci0] 4.941708
Remote Name Request (0x01|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Remote Name Req Complete (0x07) plen 255 #16 [hci0] 4.961736
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Name: MAJOR IV
@ MGMT Event: Device Connected (0x000b) plen 28 {0x0001} [hci0] 4.961936
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Flags: 0x00000008
Connection Locally Initiated
Data length: 15
Data[15]:
09 09 4d 41 4a 4f 52 20 49 56 04 0d 18 04 24 ..MAJOR IV....$
Name (complete): MAJOR IV
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
< HCI Command: Authentication Requested (0x01|0x0011) plen 2 #17 [hci0] 4.961953
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Status (0x0f) plen 4 #18 [hci0] 4.963638
Authentication Requested (0x01|0x0011) ncmd 1
Status: Success (0x00)
> HCI Event: Link Key Request (0x17) plen 6 #19 [hci0] 4.964746
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: Link Key Request Negative Reply (0x01|0x000c) plen 6 #20 [hci0] 4.964842
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Complete (0x0e) plen 10 #21 [hci0] 4.966720
Link Key Request Negative Reply (0x01|0x000c) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: IO Capability Request (0x31) plen 6 #22 [hci0] 4.967740
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: IO Capability Request Reply (0x01|0x002b) plen 9 #23 [hci0] 4.967836
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
IO capability: DisplayYesNo (0x01)
OOB data: Authentication data not present (0x00)
Authentication: Dedicated Bonding - MITM required (0x03)
> HCI Event: Command Complete (0x0e) plen 10 #24 [hci0] 4.969648
IO Capability Request Reply (0x01|0x002b) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: IO Capability Response (0x32) plen 9 #25 [hci0] 5.189727
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
IO capability: NoInputNoOutput (0x03)
OOB data: Authentication data not present (0x00)
Authentication: Dedicated Bonding - MITM not required (0x02)
> HCI Event: User Confirmation Request (0x33) plen 10 #26 [hci0] 5.448764
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Passkey: 981727
< HCI Command: User Confirmation Request Reply (0x01|0x002c) plen 6 #27 [hci0] 5.448875
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Complete (0x0e) plen 10 #28 [hci0] 5.457733
User Confirmation Request Reply (0x01|0x002c) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Simple Pairing Complete (0x36) plen 7 #29 [hci0] 25.444860
Status: Authentication Failure (0x05)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Auth Complete (0x06) plen 3 #30 [hci0] 25.445742
Status: Authentication Failure (0x05)
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
@ MGMT Event: Command Complete (0x0001) plen 10 {0x0001} [hci0] 25.445857
Pair Device (0x0019) plen 7
Status: Authentication Failed (0x05)
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
bluetoothd[1714]: @ MGMT Command: Cancel Pair Device (0x001a) plen 7 {0x0001} [hci0] 25.446248
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
@ MGMT Event: Command Status (0x0002) plen 3 {0x0001} [hci0] 25.446255
Cancel Pair Device (0x001a)
Status: Invalid Parameters (0x0d)
> HCI Event: Disconnect Complete (0x05) plen 4 #31 [hci0] 25.446739
Status: Success (0x00)
Handle: 12 (BR-ACL) Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection Timeout (0x08)
@ MGMT Event: Device Disconnected (0x000c) plen 8 {0x0001} [hci0] 25.446849
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection timeout (0x01)
bluetoothd[1714]: @ MGMT Command: Remove Device (0x0034) plen 7 {0x0001} [hci0] 25.447215
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
@ MGMT Event: Command Complete (0x0001) plen 10 {0x0001} [hci0] 25.451254
Remove Device (0x0034) plen 7
Status: Success (0x00)
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
bluetoothd[1714]: @ MGMT Command: Start Discovery (0x0023) plen 1 {0x0001} [hci0] 30.516451
Address type: 0x01
BR/EDR
< HCI Command: Inquiry (0x01|0x0001) plen 5 #32 [hci0] 30.516731
Access code: 0x9e8b33 (General Inquiry)
Length: 10.24s (0x08)
Num responses: 0
> HCI Event: Command Status (0x0f) plen 4 #33 [hci0] 30.517786
Inquiry (0x01|0x0001) ncmd 1
Status: Success (0x00)I tried downgrading bluez and bluez-utils to 5.82, but with the same result. The issue you linked seems to have occurred around the same time and looks similar. In both cases, the device is disconnected because of an authentication failure. I'm not sure why downgrading didn't work in my case. I tried restarting my machine after downgrading and got no different result sadly.
Second attempt with downgraded bluez, btmon:
Bluetooth monitor ver 5.82
btmon[19155]: = Note: Linux version 7.1.6-arch1-1 (x86_64) 0.941593
btmon[19155]: = Note: Bluetooth subsystem version 2.22 0.941596
= New Index: 40:2C:F4:D7:10:A1 (Primary,USB,hci0) [hci0] 0.941597
= Open Index: 40:2C:F4:D7:10:A1 [hci0] 0.941598
= Index Info: 40:2C:F4:D7:10:A1 (Broadcom Corporation) [hci0] 0.941598
bluetoothctl[18268]: @ MGMT Open: bluetoothctl version 1.23 {0x0002} 0.941599
bluetoothd[13910]: @ MGMT Open: bluetoothd (privileged) version 1.23 {0x0001} 0.941600
< HCI Command: Create Connection (0x01|0x0005) plen 13 #1 [hci0] 9.759798
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow peripheral (0x01)
> HCI Event: Command Status (0x0f) plen 4 #2 [hci0] 9.761767
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #3 [hci0] 10.077797
Status: Success (0x00)
Handle: 12
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #4 [hci0] 10.077892
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
btmon[19155]: @ RAW Open: btmon (privileged) version 2.22 {0x0003} 10.078071
btmon[19155]: @ RAW Close: btmon {0x0003} 10.078076
> HCI Event: Command Status (0x0f) plen 4 #5 [hci0] 10.079818
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11 #6 [hci0] 10.080789
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Features: 0xff 0xfe 0x8f 0xfe 0xdb 0xff 0x5b 0x87
3 slot packets
5 slot packets
Encryption
Slot offset
Timing accuracy
Role switch
Hold mode
Sniff mode
Power control requests
Channel quality driven data rate (CQDDR)
SCO link
HV2 packets
HV3 packets
u-law log synchronous data
A-law log synchronous data
CVSD synchronous data
Paging parameter negotiation
Power control
Transparent synchronous data
Broadcast Encryption
Enhanced Data Rate ACL 2 Mbps mode
Enhanced Data Rate ACL 3 Mbps mode
Enhanced inquiry scan
Interlaced inquiry scan
Interlaced page scan
RSSI with inquiry results
Extended SCO link (EV3 packets)
EV4 packets
EV5 packets
AFH capable peripheral
AFH classification peripheral
LE Supported (Controller)
3-slot Enhanced Data Rate ACL packets
5-slot Enhanced Data Rate ACL packets
Sniff subrating
Pause encryption
AFH capable central
AFH classification central
Enhanced Data Rate eSCO 2 Mbps mode
Enhanced Data Rate eSCO 3 Mbps mode
3-slot Enhanced Data Rate eSCO packets
Extended Inquiry Response
Simultaneous LE and BR/EDR (Controller)
Secure Simple Pairing
Encapsulated PDU
Non-flushable Packet Boundary Flag
Link Supervision Timeout Changed Event
Inquiry TX Power Level
Enhanced Power Control
Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #7 [hci0] 10.080814
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1
> HCI Event: Command Status (0x0f) plen 4 #8 [hci0] 10.082764
Read Remote Extended Features (0x01|0x001c) ncmd 1
Status: Success (0x00)
> HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 #9 [hci0] 10.111896
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R1 (0x01)
> HCI Event: Max Slots Change (0x1b) plen 3 #10 [hci0] 10.117862
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Max slots: 5
> HCI Event: Read Remote Extended Features (0x23) plen 13 #11 [hci0] 10.225879
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1/2
Features: 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Secure Simple Pairing (Host Support)
LE Supported (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10 #12 [hci0] 10.226016
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
< ACL Data TX: Handle 12 flags 0x00 dlen 10 #13 [hci0] 10.226031
L2CAP: Information Request (0x0a) ident 1 len 2
Type: Extended features supported (0x0002)
> HCI Event: Command Status (0x0f) plen 4 #14 [hci0] 10.227873
Remote Name Request (0x01|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Remote Name Req Complete (0x07) plen 255 #15 [hci0] 10.261788
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Name: MAJOR IV
@ MGMT Event: Device Connected (0x000b) plen 28 {0x0001} [hci0] 10.261868
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Flags: 0x00000008
Connection Locally Initiated
Data length: 15
Name (complete): MAJOR IV
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
> ACL Data RX: Handle 12 flags 0x02 dlen 16 #16 [hci0] 10.287488
L2CAP: Information Response (0x0b) ident 1 len 8
Type: Extended features supported (0x0002)
Result: Success (0x0000)
Features: 0x000000b8
Enhanced Retransmission Mode
Streaming Mode
FCS Option
Fixed Channels
< ACL Data TX: Handle 12 flags 0x00 dlen 10 #17 [hci0] 10.287612
L2CAP: Information Request (0x0a) ident 2 len 2
Type: Fixed channels supported (0x0003)
> HCI Event: Number of Completed Packets (0x13) plen 5 #18 [hci0] 10.292849
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#13: len 10 (1 Kb/s)
Latency: 66 msec (66-66 msec ~66 msec)
#17: len 10 (16 Kb/s)
Latency: 5 msec (5-66 msec ~36 msec)
> ACL Data RX: Handle 12 flags 0x02 dlen 20 #19 [hci0] 10.303403
L2CAP: Information Response (0x0b) ident 2 len 12
Type: Fixed channels supported (0x0003)
Result: Success (0x0000)
Channels: 0x0000000000000086
L2CAP Signaling (BR/EDR)
Connectionless reception
Security Manager (BR/EDR)
< ACL Data TX: Handle 12 flags 0x00 dlen 12 #20 [hci0] 10.303523
L2CAP: Connection Request (0x02) ident 3 len 4
PSM: 1 (0x0001)
Source CID: 64
> ACL Data RX: Handle 12 flags 0x02 dlen 16 #21 [hci0] 10.316354
L2CAP: Connection Response (0x03) ident 3 len 8
Destination CID: 1537
Source CID: 64
Result: Connection pending (0x0001)
Status: Authorization pending (0x0002)
> ACL Data RX: Handle 12 flags 0x02 dlen 16 #22 [hci0] 10.316356
L2CAP: Connection Response (0x03) ident 3 len 8
Destination CID: 1537
Source CID: 64
Result: Connection successful (0x0000)
Status: No further information available (0x0000)
< ACL Data TX: Handle 12 flags 0x00 dlen 23 #23 [hci0] 10.316377
L2CAP: Configure Request (0x04) ident 4 len 15
Destination CID: 1537
Flags: 0x0000
Option: Retransmission and Flow Control (0x04) [mandatory]
Mode: Basic (0x00)
TX window size: 0
Max transmit: 0
Retransmission timeout: 0
Monitor timeout: 0
Maximum PDU size: 0
> ACL Data RX: Handle 12 flags 0x02 dlen 16 #24 [hci0] 10.319428
L2CAP: Configure Request (0x04) ident 1 len 8
Destination CID: 64
Flags: 0x0000
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 48
< ACL Data TX: Handle 12 flags 0x00 dlen 18 #25 [hci0] 10.319486
L2CAP: Configure Response (0x05) ident 1 len 10
Source CID: 1537
Flags: 0x0000
Result: Success (0x0000)
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 48
> HCI Event: Number of Completed Packets (0x13) plen 5 #26 [hci0] 10.321850
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#20: len 12 (5 Kb/s)
Latency: 18 msec (5-66 msec ~27 msec)
#23: len 23 (36 Kb/s)
Latency: 5 msec (5-66 msec ~16 msec)
> ACL Data RX: Handle 12 flags 0x02 dlen 14 #27 [hci0] 10.328119
L2CAP: Configure Response (0x05) ident 4 len 6
Source CID: 64
Flags: 0x0000
Result: Success (0x0000)
bluetoothd[13910]: < ACL Data TX: Handle 12 flags 0x00 dlen 24 #28 [hci0] 10.328304
Channel: 1537 len 20 [PSM 1 mode Basic (0x00)] {chan 0}
SDP: Service Search Attribute Request (0x06) tid 0 len 15
Search pattern: [len 5]
Sequence (6) with 3 bytes [8 extra bits] len 5
UUID (3) with 2 bytes [0 extra bits] len 3
Handsfree (0x111e)
Max record count: 65535
Attribute list: [len 7]
Sequence (6) with 5 bytes [8 extra bits] len 7
Unsigned Integer (1) with 4 bytes [0 extra bits] len 5
0x0000ffff
Continuation state: 0
> HCI Event: Number of Completed Packets (0x13) plen 5 #29 [hci0] 10.334848
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#25: len 18 (9 Kb/s)
Latency: 15 msec (5-66 msec ~15 msec)
#28: len 24 (32 Kb/s)
Latency: 6 msec (5-66 msec ~11 msec)
Channel: 1537 [PSM 1 mode Basic (0x00)] {chan 0}
Channel Latency: 6 msec (6-6 msec ~6 msec)
> ACL Data RX: Handle 12 flags 0x02 dlen 52 #30 [hci0] 10.337413
Channel: 64 len 48 [PSM 1 mode Basic (0x00)] {chan 0}
SDP: Service Search Attribute Response (0x07) tid 0 len 43
Attribute bytes: 38
Continuation state: 2
00 39 .9
bluetoothd[13910]: < ACL Data TX: Handle 12 flags 0x00 dlen 26 #31 [hci0] 10.337649
Channel: 1537 len 22 [PSM 1 mode Basic (0x00)] {chan 0}
SDP: Service Search Attribute Request (0x06) tid 1 len 17
Search pattern: [len 5]
Sequence (6) with 3 bytes [8 extra bits] len 5
UUID (3) with 2 bytes [0 extra bits] len 3
Handsfree (0x111e)
Max record count: 65535
Attribute list: [len 7]
Sequence (6) with 5 bytes [8 extra bits] len 7
Unsigned Integer (1) with 4 bytes [0 extra bits] len 5
0x0000ffff
Continuation state: 2
00 39 .9
> HCI Event: Number of Completed Packets (0x13) plen 5 #32 [hci0] 10.589865
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 1
#31: len 26 (0 Kb/s)
Latency: 252 msec (5-252 msec ~131 msec)
Channel: 1537 [PSM 1 mode Basic (0x00)] {chan 0}
Channel Latency: 252 msec (6-252 msec ~129 msec)
> HCI Event: Disconnect Complete (0x05) plen 4 #33 [hci0] 30.348586
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection Timeout (0x08)
@ MGMT Event: Device Disconnected (0x000c) plen 8 {0x0001} [hci0] 30.348722
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection timeout (0x01)
bluetoothd[13910]: = src/profile.c:record_cb() Unable to get Hands-Free Voice gateway SDP... 30.356911
< HCI Command: Create Connection (0x01|0x0005) plen 13 #34 [hci0] 30.364882
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow peripheral (0x01)
> HCI Event: Command Status (0x0f) plen 4 #35 [hci0] 30.366530
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #36 [hci0] 31.891706
Status: Success (0x00)
Handle: 12
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #37 [hci0] 31.891932
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
btmon[19155]: @ RAW Open: btmon (privileged) version 2.22 {0x0003} 31.892230
btmon[19155]: @ RAW Close: btmon {0x0003} 31.892238
> HCI Event: Command Status (0x0f) plen 4 #38 [hci0] 31.893525
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11 #39 [hci0] 31.894521
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Features: 0xff 0xfe 0x8f 0xfe 0xdb 0xff 0x5b 0x87
3 slot packets
5 slot packets
Encryption
Slot offset
Timing accuracy
Role switch
Hold mode
Sniff mode
Power control requests
Channel quality driven data rate (CQDDR)
SCO link
HV2 packets
HV3 packets
u-law log synchronous data
A-law log synchronous data
CVSD synchronous data
Paging parameter negotiation
Power control
Transparent synchronous data
Broadcast Encryption
Enhanced Data Rate ACL 2 Mbps mode
Enhanced Data Rate ACL 3 Mbps mode
Enhanced inquiry scan
Interlaced inquiry scan
Interlaced page scan
RSSI with inquiry results
Extended SCO link (EV3 packets)
EV4 packets
EV5 packets
AFH capable peripheral
AFH classification peripheral
LE Supported (Controller)
3-slot Enhanced Data Rate ACL packets
5-slot Enhanced Data Rate ACL packets
Sniff subrating
Pause encryption
AFH capable central
AFH classification central
Enhanced Data Rate eSCO 2 Mbps mode
Enhanced Data Rate eSCO 3 Mbps mode
3-slot Enhanced Data Rate eSCO packets
Extended Inquiry Response
Simultaneous LE and BR/EDR (Controller)
Secure Simple Pairing
Encapsulated PDU
Non-flushable Packet Boundary Flag
Link Supervision Timeout Changed Event
Inquiry TX Power Level
Enhanced Power Control
Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #40 [hci0] 31.894556
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1
> HCI Event: Command Status (0x0f) plen 4 #41 [hci0] 31.896577
Read Remote Extended Features (0x01|0x001c) ncmd 1
Status: Success (0x00)
> HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 #42 [hci0] 31.957614
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R1 (0x01)
> HCI Event: Max Slots Change (0x1b) plen 3 #43 [hci0] 32.007582
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Max slots: 5
> HCI Event: Read Remote Extended Features (0x23) plen 13 #44 [hci0] 32.140685
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1/2
Features: 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Secure Simple Pairing (Host Support)
LE Supported (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10 #45 [hci0] 32.140793
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
> HCI Event: Command Status (0x0f) plen 4 #46 [hci0] 32.142639
Remote Name Request (0x01|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Remote Name Req Complete (0x07) plen 255 #47 [hci0] 32.163601
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Name: MAJOR IV
@ MGMT Event: Device Connected (0x000b) plen 28 {0x0001} [hci0] 32.163655
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Flags: 0x00000008
Connection Locally Initiated
Data length: 15
Name (complete): MAJOR IV
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
< HCI Command: Authentication Requested (0x01|0x0011) plen 2 #48 [hci0] 32.163672
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Status (0x0f) plen 4 #49 [hci0] 32.165568
Authentication Requested (0x01|0x0011) ncmd 1
Status: Success (0x00)
> HCI Event: Link Key Request (0x17) plen 6 #50 [hci0] 32.166585
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: Link Key Request Negative Reply (0x01|0x000c) plen 6 #51 [hci0] 32.166630
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Complete (0x0e) plen 10 #52 [hci0] 32.168560
Link Key Request Negative Reply (0x01|0x000c) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: IO Capability Request (0x31) plen 6 #53 [hci0] 32.169580
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: IO Capability Request Reply (0x01|0x002b) plen 9 #54 [hci0] 32.169631
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
IO capability: DisplayYesNo (0x01)
OOB data: Authentication data not present (0x00)
Authentication: General Bonding - MITM required (0x05)
> HCI Event: Command Complete (0x0e) plen 10 #55 [hci0] 32.171599
IO Capability Request Reply (0x01|0x002b) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: IO Capability Response (0x32) plen 9 #56 [hci0] 32.411627
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
IO capability: NoInputNoOutput (0x03)
OOB data: Authentication data not present (0x00)
Authentication: General Bonding - MITM not required (0x04)
> HCI Event: Simple Pairing Complete (0x36) plen 7 #57 [hci0] 52.460345
Status: Authentication Failure (0x05)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Auth Complete (0x06) plen 3 #58 [hci0] 52.461272
Status: Authentication Failure (0x05)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
@ MGMT Event: Authentication Failed (0x0011) plen 8 {0x0001} [hci0] 52.461322
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Status: Authentication Failed (0x05)
bluetoothd[13910]: = profiles/audio/avdtp.c:avdtp_connect_cb() connect to 1C:6E:4C:AD:33:E.. 52.461987
> HCI Event: Disconnect Complete (0x05) plen 4 #59 [hci0] 52.462306
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection Timeout (0x08)
@ MGMT Event: Device Disconnected (0x000c) plen 8 {0x0001} [hci0] 52.469620
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection timeout (0x01)
< HCI Command: Create Connection (0x01|0x0005) plen 13 #60 [hci0] 55.098970
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Packet type: 0xcc18
DM1 may be used
DH1 may be used
DM3 may be used
DH3 may be used
DM5 may be used
DH5 may be used
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
Role switch: Allow peripheral (0x01)
> HCI Event: Command Status (0x0f) plen 4 #61 [hci0] 55.100407
Create Connection (0x01|0x0005) ncmd 1
Status: Success (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #62 [hci0] 56.214481
Status: Success (0x00)
Handle: 12
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #63 [hci0] 56.214743
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
btmon[19155]: @ RAW Open: btmon (privileged) version 2.22 {0x0003} 56.215237
btmon[19155]: @ RAW Close: btmon {0x0003} 56.215254
> HCI Event: Command Status (0x0f) plen 4 #64 [hci0] 56.216398
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11 #65 [hci0] 56.217406
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Features: 0xff 0xfe 0x8f 0xfe 0xdb 0xff 0x5b 0x87
3 slot packets
5 slot packets
Encryption
Slot offset
Timing accuracy
Role switch
Hold mode
Sniff mode
Power control requests
Channel quality driven data rate (CQDDR)
SCO link
HV2 packets
HV3 packets
u-law log synchronous data
A-law log synchronous data
CVSD synchronous data
Paging parameter negotiation
Power control
Transparent synchronous data
Broadcast Encryption
Enhanced Data Rate ACL 2 Mbps mode
Enhanced Data Rate ACL 3 Mbps mode
Enhanced inquiry scan
Interlaced inquiry scan
Interlaced page scan
RSSI with inquiry results
Extended SCO link (EV3 packets)
EV4 packets
EV5 packets
AFH capable peripheral
AFH classification peripheral
LE Supported (Controller)
3-slot Enhanced Data Rate ACL packets
5-slot Enhanced Data Rate ACL packets
Sniff subrating
Pause encryption
AFH capable central
AFH classification central
Enhanced Data Rate eSCO 2 Mbps mode
Enhanced Data Rate eSCO 3 Mbps mode
3-slot Enhanced Data Rate eSCO packets
Extended Inquiry Response
Simultaneous LE and BR/EDR (Controller)
Secure Simple Pairing
Encapsulated PDU
Non-flushable Packet Boundary Flag
Link Supervision Timeout Changed Event
Inquiry TX Power Level
Enhanced Power Control
Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #66 [hci0] 56.217515
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1
> HCI Event: Command Status (0x0f) plen 4 #67 [hci0] 56.219364
Read Remote Extended Features (0x01|0x001c) ncmd 1
Status: Success (0x00)
> HCI Event: Page Scan Repetition Mode Change (0x20) plen 7 #68 [hci0] 56.300415
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R1 (0x01)
> HCI Event: Max Slots Change (0x1b) plen 3 #69 [hci0] 56.345457
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Max slots: 5
> HCI Event: Read Remote Extended Features (0x23) plen 13 #70 [hci0] 56.445513
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1/2
Features: 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Secure Simple Pairing (Host Support)
LE Supported (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10 #71 [hci0] 56.445663
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
> HCI Event: Command Status (0x0f) plen 4 #72 [hci0] 56.447443
Remote Name Request (0x01|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Remote Name Req Complete (0x07) plen 255 #73 [hci0] 56.483505
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Name: MAJOR IV
@ MGMT Event: Device Connected (0x000b) plen 28 {0x0001} [hci0] 56.483627
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Flags: 0x00000008
Connection Locally Initiated
Data length: 15
Name (complete): MAJOR IV
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
< HCI Command: Authentication Requested (0x01|0x0011) plen 2 #74 [hci0] 56.483649
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Status (0x0f) plen 4 #75 [hci0] 56.485377
Authentication Requested (0x01|0x0011) ncmd 1
Status: Success (0x00)
> HCI Event: Link Key Request (0x17) plen 6 #76 [hci0] 56.486374
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: Link Key Request Negative Reply (0x01|0x000c) plen 6 #77 [hci0] 56.486418
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Command Complete (0x0e) plen 10 #78 [hci0] 56.488384
Link Key Request Negative Reply (0x01|0x000c) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: IO Capability Request (0x31) plen 6 #79 [hci0] 56.489379
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: IO Capability Request Reply (0x01|0x002b) plen 9 #80 [hci0] 56.489403
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
IO capability: DisplayYesNo (0x01)
OOB data: Authentication data not present (0x00)
Authentication: General Bonding - MITM required (0x05)
> HCI Event: Command Complete (0x0e) plen 10 #81 [hci0] 56.491405
IO Capability Request Reply (0x01|0x002b) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Simple Pairing Complete (0x36) plen 7 #82 [hci0] 76.470230
Status: Authentication Failure (0x05)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Auth Complete (0x06) plen 3 #83 [hci0] 76.471095
Status: Authentication Failure (0x05)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
@ MGMT Event: Authentication Failed (0x0011) plen 8 {0x0001} [hci0] 76.471137
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Status: Authentication Failed (0x05)
bluetoothd[13910]: = profiles/audio/avdtp.c:avdtp_connect_cb() connect to 1C:6E:4C:AD:33:E.. 76.471761
> HCI Event: Disconnect Complete (0x05) plen 4 #84 [hci0] 76.472091
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection Timeout (0x08)
@ MGMT Event: Device Disconnected (0x000c) plen 8 {0x0001} [hci0] 76.477466
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection timeout (0x01)Last edited by sigurd4 (2026-08-10 19:53:40)
Offline
#7 2026-08-11 01:48:30
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
Update (partially solved):
Since i'm able to connect to the headset from my rooted android phone, i was able to extract the link key from `/data/misc/bluedroid/bt_config.conf` after pairing from the phone, and, as described in https://wiki.archlinux.org/title/Blueto … h_5.1_Keys, enter the code directly into `/var/lib/bluetooth/<bluetooth adapter MAC address>/<bluetooth device MAC address>/info` in the format:
[LinkKey]
Key=<link key here from android phone>
Type=4
PINLength=0... then restarting the bluetooth systemd service and suddenly both connecting and pairing worked! Now there's a new problem. It keeps disconnecting after a minute or so every time it connects, and the audio sink does not appear either.
`systemctl status bluetooth.service` yields:
● bluetooth.service - Bluetooth service
Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: disabled)
Active: active (running) since Tue 2026-08-11 03:30:17 CEST; 5min ago
Invocation: 69a7b79f54ed4854b454413f69957bd2
Docs: man:bluetoothd(8)
Main PID: 233154 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 38258)
Memory: 1016K (peak: 2.6M)
CPU: 354ms
CGroup: /system.slice/bluetooth.service
└─233154 /usr/lib/bluetooth/bluetoothd
Aug 11 03:30:18 KBG5813 bluetoothd[233154]: Endpoint registered: sender=:1.41 path=/MediaEndpoint/A2DPSink/opus_05_duplex
Aug 11 03:30:18 KBG5813 bluetoothd[233154]: Endpoint registered: sender=:1.41 path=/MediaEndpoint/A2DPSource/opus_05_duplex
Aug 11 03:30:44 KBG5813 bluetoothd[233154]: src/profile.c:ext_connect() Hands-Free Voice gateway failed connect to 1C:6E:4C:AD:33:ED: Connection timed out (110)
Aug 11 03:31:05 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to 1C:6E:4C:AD:33:ED: Connection timed out (110)
Aug 11 03:31:35 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
Aug 11 03:32:18 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
Aug 11 03:33:01 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
Aug 11 03:33:43 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
Aug 11 03:34:26 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)
Aug 11 03:35:09 KBG5813 bluetoothd[233154]: profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110)`btmon` says:
Bluetooth monitor ver 5.82
btmon[235725]: = Note: Linux version 7.1.6-arch1-1 (x86_64) 0.723579
btmon[235725]: = Note: Bluetooth subsystem version 2.22 0.723582
= New Index: 40:2C:F4:D7:10:A1 (Primary,USB,hci0) [hci0] 0.723583
= Open Index: 40:2C:F4:D7:10:A1 [hci0] 0.723583
= Index Info: 40:2C:F4:D7:10:A1 (Broadcom Corporation) [hci0] 0.723584
bluetoothd[233154]: @ MGMT Open: bluetoothd (privileged) version 1.23 {0x0001} 0.723585
> HCI Event: Connect Request (0x04) plen 10 #1 [hci0] 20.090652
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
Link type: ACL (0x01)
< HCI Command: Accept Connection Request (0x01|0x0009) plen 7 #2 [hci0] 20.090772
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Role: Central (0x00)
> HCI Event: Command Status (0x0f) plen 4 #3 [hci0] 20.092642
Accept Connection Request (0x01|0x0009) ncmd 1
Status: Success (0x00)
> HCI Event: Role Change (0x12) plen 8 #4 [hci0] 20.268629
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Role: Central (0x00)
> HCI Event: Connect Complete (0x03) plen 11 #5 [hci0] 20.430706
Status: Success (0x00)
Handle: 12
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link type: ACL (0x01)
Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2 #6 [hci0] 20.431082
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
btmon[235725]: @ RAW Open: btmon (privileged) version 2.22 {0x0002} 20.431498
btmon[235725]: @ RAW Close: btmon {0x0002} 20.431522
> HCI Event: Command Status (0x0f) plen 4 #7 [hci0] 20.432554
Read Remote Supported Features (0x01|0x001b) ncmd 1
Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11 #8 [hci0] 20.433552
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Features: 0xff 0xfe 0x8f 0xfe 0xdb 0xff 0x5b 0x87
3 slot packets
5 slot packets
Encryption
Slot offset
Timing accuracy
Role switch
Hold mode
Sniff mode
Power control requests
Channel quality driven data rate (CQDDR)
SCO link
HV2 packets
HV3 packets
u-law log synchronous data
A-law log synchronous data
CVSD synchronous data
Paging parameter negotiation
Power control
Transparent synchronous data
Broadcast Encryption
Enhanced Data Rate ACL 2 Mbps mode
Enhanced Data Rate ACL 3 Mbps mode
Enhanced inquiry scan
Interlaced inquiry scan
Interlaced page scan
RSSI with inquiry results
Extended SCO link (EV3 packets)
EV4 packets
EV5 packets
AFH capable peripheral
AFH classification peripheral
LE Supported (Controller)
3-slot Enhanced Data Rate ACL packets
5-slot Enhanced Data Rate ACL packets
Sniff subrating
Pause encryption
AFH capable central
AFH classification central
Enhanced Data Rate eSCO 2 Mbps mode
Enhanced Data Rate eSCO 3 Mbps mode
3-slot Enhanced Data Rate eSCO packets
Extended Inquiry Response
Simultaneous LE and BR/EDR (Controller)
Secure Simple Pairing
Encapsulated PDU
Non-flushable Packet Boundary Flag
Link Supervision Timeout Changed Event
Inquiry TX Power Level
Enhanced Power Control
Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3 #9 [hci0] 20.433643
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1
> HCI Event: Command Status (0x0f) plen 4 #10 [hci0] 20.435543
Read Remote Extended Features (0x01|0x001c) ncmd 1
Status: Success (0x00)
> HCI Event: Max Slots Change (0x1b) plen 3 #11 [hci0] 20.438533
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Max slots: 5
> HCI Event: Read Remote Extended Features (0x23) plen 13 #12 [hci0] 20.451536
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page: 1/2
Features: 0x03 0x00 0x00 0x00 0x00 0x00 0x00 0x00
Secure Simple Pairing (Host Support)
LE Supported (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10 #13 [hci0] 20.451596
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Page scan repetition mode: R2 (0x02)
Page scan mode: Mandatory (0x00)
Clock offset: 0x0000
< ACL Data TX: Handle 12 flags 0x00 dlen 10 #14 [hci0] 20.451605
L2CAP: Information Request (0x0a) ident 1 len 2
Type: Extended features supported (0x0002)
> HCI Event: Command Status (0x0f) plen 4 #15 [hci0] 20.453561
Remote Name Request (0x01|0x0019) ncmd 1
Status: Success (0x00)
> HCI Event: Link Key Request (0x17) plen 6 #16 [hci0] 20.462587
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22 #17 [hci0] 20.462659
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Link key[16]: 5881c1c5e6b05a3b7c1a9651b971fa0e
> ACL Data RX: Handle 12 flags 0x02 dlen 16 #18 [hci0] 20.464597
L2CAP: Information Response (0x0b) ident 1 len 8
Type: Extended features supported (0x0002)
Result: Success (0x0000)
Features: 0x000000b8
Enhanced Retransmission Mode
Streaming Mode
FCS Option
Fixed Channels
< ACL Data TX: Handle 12 flags 0x00 dlen 10 #19 [hci0] 20.464645
L2CAP: Information Request (0x0a) ident 2 len 2
Type: Fixed channels supported (0x0003)
> ACL Data RX: Handle 12 flags 0x02 dlen 20 #20 [hci0] 20.472420
L2CAP: Information Response (0x0b) ident 2 len 12
Type: Fixed channels supported (0x0003)
Result: Success (0x0000)
Channels: 0x0000000000000086
L2CAP Signaling (BR/EDR)
Connectionless reception
Security Manager (BR/EDR)
> HCI Event: Remote Name Req Complete (0x07) plen 255 #21 [hci0] 20.480571
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Name: MAJOR IV
@ MGMT Event: Device Connected (0x000b) plen 28 {0x0001} [hci0] 20.480599
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Flags: 0x00000000
Data length: 15
Name (complete): MAJOR IV
Class: 0x240418
Major class: Audio/Video (headset, speaker, stereo, video, vcr)
Minor class: Headphones
Rendering (Printing, Speaker)
Audio (Speaker, Microphone, Headset)
> HCI Event: Command Complete (0x0e) plen 10 #22 [hci0] 20.481538
Link Key Request Reply (0x01|0x000b) ncmd 1
Status: Success (0x00)
Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
> HCI Event: Number of Completed Packets (0x13) plen 5 #23 [hci0] 20.482568
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#14: len 10 (2 Kb/s)
Latency: 30 msec (30-30 msec ~30 msec)
#19: len 10 (4 Kb/s)
Latency: 17 msec (17-30 msec ~24 msec)
> HCI Event: Encryption Change (0x08) plen 4 #24 [hci0] 20.546570
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Encryption: Enabled with E0 (0x01)
> ACL Data RX: Handle 12 flags 0x02 dlen 12 #25 [hci0] 20.551450
L2CAP: Connection Request (0x02) ident 1 len 4
PSM: 25 (0x0019)
Source CID: 8320
< ACL Data TX: Handle 12 flags 0x00 dlen 16 #26 [hci0] 20.551617
L2CAP: Connection Response (0x03) ident 1 len 8
Destination CID: 64
Source CID: 8320
Result: Connection pending (0x0001)
Status: Authorization pending (0x0002)
< ACL Data TX: Handle 12 flags 0x00 dlen 16 #27 [hci0] 20.551978
L2CAP: Connection Response (0x03) ident 1 len 8
Destination CID: 64
Source CID: 8320
Result: Connection successful (0x0000)
Status: No further information available (0x0000)
< ACL Data TX: Handle 12 flags 0x00 dlen 27 #28 [hci0] 20.552005
L2CAP: Configure Request (0x04) ident 3 len 19
Destination CID: 8320
Flags: 0x0000
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 1021
Option: Retransmission and Flow Control (0x04) [mandatory]
Mode: Basic (0x00)
TX window size: 0
Max transmit: 0
Retransmission timeout: 0
Monitor timeout: 0
Maximum PDU size: 0
> HCI Event: Number of Completed Packets (0x13) plen 5 #29 [hci0] 20.556644
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#26: len 16 (25 Kb/s)
Latency: 5 msec (5-30 msec ~14 msec)
#27: len 16 (32 Kb/s)
Latency: 4 msec (4-30 msec ~9 msec)
> ACL Data RX: Handle 12 flags 0x02 dlen 20 #30 [hci0] 20.562389
L2CAP: Configure Request (0x04) ident 2 len 12
Destination CID: 64
Flags: 0x0000
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 895
Option: Flush Timeout (0x02) [mandatory]
Flush timeout: 65535
> ACL Data RX: Handle 12 flags 0x02 dlen 22 #31 [hci0] 20.562394
L2CAP: Configure Response (0x05) ident 3 len 14
Source CID: 64
Flags: 0x0000
Result: Success (0x0000)
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 1021
Option: Flush Timeout (0x02) [mandatory]
Flush timeout: 65535
< ACL Data TX: Handle 12 flags 0x00 dlen 18 #32 [hci0] 20.562495
L2CAP: Configure Response (0x05) ident 2 len 10
Source CID: 8320
Flags: 0x0000
Result: Success (0x0000)
Option: Maximum Transmission Unit (0x01) [mandatory]
MTU: 895
> HCI Event: Number of Completed Packets (0x13) plen 5 #33 [hci0] 20.566619
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#28: len 27 (15 Kb/s)
Latency: 14 msec (4-30 msec ~12 msec)
#32: len 18 (36 Kb/s)
Latency: 4 msec (4-30 msec ~8 msec)
bluetoothd[233154]: < ACL Data TX: Handle 12 flags 0x00 dlen 6 #34 [hci0] 22.100208
Channel: 8320 len 2 [PSM 25 mode Basic (0x00)] {chan 0}
AVDTP: Discover (0x01) Command (0x00) type 0x00 label 13 nosp 0
bluetoothd[233154]: = profiles/audio/avdtp.c:cancel_request() Discover: Connection timed out (110) 28.104796
< ACL Data TX: Handle 12 flags 0x00 dlen 12 #35 [hci0] 28.104829
L2CAP: Disconnection Request (0x06) ident 4 len 4
Destination CID: 8320
Source CID: 64
> HCI Event: Number of Completed Packets (0x13) plen 5 #36 [hci0] 40.674482
Num handles: 1
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Count: 2
#34: len 6 (0 Kb/s)
Latency: 18574 msec (4-18574 msec ~9791 msec)
Channel: 8320 [PSM 25 mode Basic (0x00)] {chan 0}
Channel Latency: 18574 msec (18574-18574 msec ~18574 msec)
#35: len 12 (0 Kb/s)
Latency: 12569 msec (4-18574 msec ~11680 msec)
> HCI Event: Disconnect Complete (0x05) plen 4 #37 [hci0] 40.675298
Status: Success (0x00)
Handle: 12 Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection Timeout (0x08)
@ MGMT Event: Device Disconnected (0x000c) plen 8 {0x0001} [hci0] 40.675412
BR/EDR Address: 1C:6E:4C:AD:33:ED (Logistic Service & Engineering Co.,Ltd)
Reason: Connection timeout (0x01)`bluetoothctl info` gives:
Device 1C:6E:4C:AD:33:ED (public)
Name: MAJOR IV
Alias: MAJOR IV
Class: 0x00240418 (2360344)
Icon: audio-headphones
Paired: yes
Bonded: yes
Trusted: yes
Blocked: no
Connected: yes
LegacyPairing: no
UUID: Serial Port (00001101-0000-1000-8000-00805f9b34fb)
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: Advanced Audio Distribu.. (0000110d-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Cont.. (0000110f-0000-1000-8000-00805f9b34fb)
UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)
UUID: Headset HS (00001131-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
UUID: Generic Access Profile (00001800-0000-1000-8000-00805f9b34fb)
Modalias: bluetooth:v000ApFFFFdFFFFThis is at least some progress! Downgrading to bluez 5.82 does not seem to affect the result.
It seems to time out now, possibly due to an inability to do some audio related stuff. I'm not sure...
I managed to bypass the failed pairing process, so this is a whole different thing i suppose. Seems more similar to what other people are experiencing (disconnect after a while + no audio sink instead of pairing-failure).
Last edited by sigurd4 (2026-08-11 01:51:19)
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#8 2026-08-22 17:07:33
- sigurd4
- Member
- Registered: 2025-03-07
- Posts: 11
- Website
Re: Connection issues with Marshall Major IV headphones
The bluetooth chip BCM2070 only supports bluetooth v2.1. Using an external USB bluetooth adapter with bluetooth v5 support was a successful workaround.
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