Arch Linux

Shadowbee

Member

Registered: 2026-05-15

Posts: 1

Bluetooth not working after kernel update

After I updated to 7.0.7-arch1-1 form 7.0.5-arch1-1 bluetooth just stopped working.
In rfkill hci0: Bluetooth is soft blocked
This is the journalctl after i restart bluetooth.service

May 15 13:06:21 spaceship systemd[1]: Stopping Bluetooth service...
May 15 13:06:21 spaceship bluetoothd[5431]: Stopping SDP server
May 15 13:06:21 spaceship bluetoothd[5431]: Exit
May 15 13:06:21 spaceship systemd[1]: bluetooth.service: Deactivated successfully.
May 15 13:06:21 spaceship systemd[1]: Stopped Bluetooth service.
May 15 13:06:21 spaceship systemd[1]: Starting Bluetooth service...
May 15 13:06:21 spaceship blueman-applet[1828]: blueman-applet 13.06.21 WARNING  DiscvManager:122 update_menuitems: warning: Adapter is None
May 15 13:06:21 spaceship bluetoothd[11799]: Bluetooth daemon 5.86
May 15 13:06:21 spaceship systemd[1]: Started Bluetooth service.
May 15 13:06:21 spaceship bluetoothd[11799]: Starting SDP server
May 15 13:06:21 spaceship bluetoothd[11799]: Bluetooth management interface 1.23 initialized
May 15 13:06:21 spaceship systemd[1]: Starting Hostname Service...
May 15 13:06:21 spaceship sudo[11791]: pam_unix(sudo:session): session closed for user root
May 15 13:06:21 spaceship blueman-applet[1828]: blueman-applet 13.06.21 WARNING  DiscvManager:122 update_menuitems: warning: Adapter is None

bluetoothctl list returns nothing
bluetoothctl devices returns:

No default controller available

my bluetooth adapter is

Bus 001 Device 003: ID 0489:e0e2 Foxconn / Hon Hai Wireless_Device

I have installed broadcom-bt-firmware but it didn't help

krnlpk

Member

Registered: 2010-01-03

Posts: 29

Re: Bluetooth not working after kernel update

Same with me after updating from 6.18.29 LTS to 6.18.30 LTS, I too have a Mediatek-based integrated Bluetooth adapter connected via USB (internally), reported as a "Foxconn / Hon Hai Wireless_Device" by lsusb. Rolling back the kernel fixes the issue. I suspect that the modifications done to the mt76 driver are the culprit, if you look in the changelog of 6.18.30 there are several small modifications to mt76, which I guess are a backport of whatever they did on 7.0.xnope mt76 is the wireless driver not the bluetooth driver. the driver is probably btmtk and there are changes in that too

I love how 16 years I just accepted that Linux bugfix updates tend to break stuff more than major releases

Last edited by krnlpk (2026-05-15 13:24:45)

krnlpk

Member

Registered: 2010-01-03

Posts: 29

Re: Bluetooth not working after kernel update

Ok someone reported the regression and indeed it is btmtk

Just roll back to the older kernel, pin it and wait for a patch

Dante777

Member

Registered: 2016-07-12

Posts: 33

Re: Bluetooth not working after kernel update

Heads Up: There's been an update (Linux 7.0.7-arch2-1) but issue still persists.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,206

Re: Bluetooth not working after kernel update

The patch to fix this is applied on 7.0.8-arch1 which is in testing currently: https://github.com/archlinux/linux/rele … .0.8-arch1

Last edited by V1del (2026-05-15 17:52:52)

4U3YEmHM

Member

Registered: 2016-03-10

Posts: 1

Re: Bluetooth not working after kernel update

So in the meantime  I'm going to get the cable for my headphone ... Thank you for the information.

krnlpk

Member

Registered: 2010-01-03

Posts: 29

Re: Bluetooth not working after kernel update

The patch to fix this is applied on 7.0.8-arch1 which is in testing currently: https://github.com/archlinux/linux/rele … .0.8-arch1

Any idea if this has been backported to the LTS kernel too?

yanshrey

Member

Registered: 2026-05-16

Posts: 1

Re: Bluetooth not working after kernel update

The patch worked for LTS

I was on Linux LTS v6.18.26. Upgrading to v6.18.30 broke my bluetooth adapter. My Adapter is MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter

For now I have manually applied the patch and I'm booting into Arch via custom kernel.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,206

Re: Bluetooth not working after kernel update

Any idea if this has been backported to the LTS kernel too?

Doesn't look like it: https://gitlab.archlinux.org/archlinux/ … /linux-lts

krnlpk

Member

Registered: 2010-01-03

Posts: 29

Re: Bluetooth not working after kernel update

Any idea if this has been backported to the LTS kernel too?

Doesn't look like it: https://gitlab.archlinux.org/archlinux/ … /linux-lts

Dang, I suspect they won't do it for LTS because Arch doesn't really have its own fork with patches for it. No fuss, I'll just --ignore linux-lts for a while, hopefully upstream will patch the regression properly in .32

virgilggx

Member

Registered: 2024-05-12

Posts: 37

Re: Bluetooth not working after kernel update

The patch to fix this is applied on 7.0.8-arch1 which is in testing currently: https://github.com/archlinux/linux/rele … .0.8-arch1

Hello,

Do you know if this has been fixed in the hardened version?

I'm still seeing the problem:

Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20260224111231
Bluetooth: hci0: Failed to send wmt func ctrl (-22)
Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.

And I'm using this kernel version:

7.0.9-hardened1-1-hardened

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,732

Re: Bluetooth not working after kernel update

https://github.com/anthraxx/linux-harde … 81d80fcd09
Your error also fits https://bbs.archlinux.org/viewtopic.php?id=313561 but nb. that this is specifically a bug in the mediatek driver - do you have such chip and is the printed kernel version from "uname -r"?

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virgilggx

Member

Registered: 2024-05-12

Posts: 37

Re: Bluetooth not working after kernel update

https://github.com/anthraxx/linux-harde … 81d80fcd09
Your error also fits https://bbs.archlinux.org/viewtopic.php?id=313561 but nb. that this is specifically a bug in the mediatek driver - do you have such chip and is the printed kernel version from "uname -r"?

I'm not sure if you were replying to me, but here's my response:

❯ uname -r

7.0.9-hardened1-1-hardened

❯ lspci -nnk | grep -iA3 -e network -e wireless

03:00.0 Network controller [0280]: MEDIATEK Corp. Device [14c3:7920]
	DeviceName: Realtek
	Subsystem: Lenovo Device [17aa:e020]
	Kernel driver in use: mt7921e

❯ sudo dmesg 2>&1 | grep -iE 'bluetooth'

[   23.898011] Bluetooth: Core ver 2.22
[   23.898032] NET: Registered PF_BLUETOOTH protocol family
[   23.898033] Bluetooth: HCI device and connection manager initialized
[   23.898041] Bluetooth: HCI socket layer initialized
[   23.898043] Bluetooth: L2CAP socket layer initialized
[   23.898045] Bluetooth: SCO socket layer initialized
[   24.800153] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20260224111231
[   24.922472] Bluetooth: hci0: Failed to send wmt func ctrl (-22)
[   24.922477] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.
[   25.517793] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   25.517796] Bluetooth: BNEP filters: protocol multicast
[   25.517800] Bluetooth: BNEP socket layer initialized

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,732

Re: Bluetooth not working after kernel update

Yes.
You're running the latest kernel, does the chip actually work on the 7.0.6 or 7.0.8/9 main kernel?
What's the output of "lsusb"?

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virgilggx

Member

Registered: 2024-05-12

Posts: 37

Re: Bluetooth not working after kernel update

Yes.
You're running the latest kernel, does the chip actually work on the 7.0.6 or 7.0.8/9 main kernel?
What's the output of "lsusb"?

On 7.0.6 yes, 7.0.8/9 no

❯ lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 05ac:12a8 Apple, Inc. iPhone 5/5C/5S/6/SE/7/8/X/XR
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 1b3f:2020 Generalplus Technology Inc. HD 1080P WebCam
Bus 003 Device 003: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 004: ID 145f:0317 Trust Trust Deskset
Bus 003 Device 005: ID 1b1c:1bff Corsair CORSAIR K70 CORE RGB Mechanical Gaming Keyboard
Bus 003 Device 006: ID 0e8d:e020 MediaTek Inc. Wireless_Device
Bus 003 Device 007: ID 048d:c195 Integrated Technology Express, Inc. ITE Device(8258)
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 002: ID 05e3:0620 Genesys Logic, Inc. GL3523 Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 002: ID 5986:11ad Bison Electronics Inc. Integrated Camera

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,732

Re: Bluetooth not working after kernel update

Bus 003 Device 006: ID 0e8d:e020 MediaTek Inc. Wireless_Device

isn't the 0489:e0e2, so there might easily be a second bug in https://github.com/anthraxx/linux-harde … d330596e81 that's not addressed in the subsequent patch.

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virgilggx

Member

Registered: 2024-05-12

Posts: 37

Re: Bluetooth not working after kernel update

Bus 003 Device 006: ID 0e8d:e020 MediaTek Inc. Wireless_Device

isn't the 0489:e0e2, so there might easily be a second bug in https://github.com/anthraxx/linux-harde … d330596e81 that's not addressed in the subsequent patch.

Thanks you, anything to do?

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,732

Re: Bluetooth not working after kernel update

https://bugzilla.kernel.org/buglist.cgi … esolution=---
None of the recent MTK related posts (mostly bumping unrelated bugs w/ the recent regression) has you product ID, file a new one, stress that https://github.com/anthraxx/linux-harde … 81d80fcd09 does not fix this.

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virgilggx

Member

Registered: 2024-05-12

Posts: 37

Re: Bluetooth not working after kernel update

https://bugzilla.kernel.org/buglist.cgi … esolution=---
None of the recent MTK related posts (mostly bumping unrelated bugs w/ the recent regression) has you product ID, file a new one, stress that https://github.com/anthraxx/linux-harde … 81d80fcd09 does not fix this.

Thanks, done: https://bugzilla.kernel.org/show_bug.cgi?id=221552