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Hi, this issue has seem to arisen after some time of bluetooth working properly. When I enter `bluetoothctl scan on` in the terminal, it simply hangs for 5m before timing out:
```
➜ ~ time bluetoothctl scan on
Failed to start discovery: org.freedesktop.DBus.Error.NoReply
bluetoothctl scan on 0.00s user 0.00s system 0% cpu 5:00.02 total
```
I believe whatever is at the root of this issue is the same one that's causing no devices to show up in my Plasma bluetooth pairing window - the devices simply never show. Here is the logs from `status bluetooth.service`, not sure if this helps but this is all I could think of
```
● bluetooth.service - Bluetooth service
Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: disabled)
Active: active (running) since Sat 2023-02-04 20:19:44 MST; 1s ago
Docs: man:bluetoothd(8)
Main PID: 142501 (bluetoothd)
Status: "Running"
Tasks: 1 (limit: 77041)
Memory: 1012.0K
CPU: 20ms
CGroup: /system.slice/bluetooth.service
└─142501 /usr/lib/bluetooth/bluetoothd
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSink/aptx
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSource/aptx
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSink/sbc
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSource/sbc
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSink/sbc_xq_453
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSource/sbc_xq_453
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSink/sbc_xq_512
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSource/sbc_xq_512
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSink/sbc_xq_552
Feb 04 20:19:44 matt-work bluetoothd[142501]: Endpoint registered: sender=:1.95 path=/MediaEndpoint/A2DPSource/sbc_xq_552
```
`hciconfig -a`:
```
hci0: Type: Primary Bus: USB
BD Address: B8:9A:2A:28:29:49 ACL MTU: 1021:4 SCO MTU: 96:6
UP RUNNING PSCAN
RX bytes:4704490 acl:0 sco:0 events:96210 errors:0
TX bytes:10732 acl:0 sco:0 commands:192 errors:0
Features: 0xbf 0xfe 0x0f 0xfe 0xdb 0xff 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH SNIFF
Link mode: PERIPHERAL ACCEPT
Name: 'matt-work'
Class: 0x7c0104
Service Classes: Rendering, Capturing, Object Transfer, Audio, Telephony
Device Class: Computer, Desktop workstation
HCI Version: 5.2 (0xb) Revision: 0x200f
LMP Version: 5.2 (0xb) Subversion: 0x200f
Manufacturer: Intel Corp. (2)
```
`rfkill`:
```
ID TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
1 wlan phy0 unblocked unblocked
```
Here is the `sudo btmon` text logs, I started monitoring, then ran `bluetoothctl scan on`: https://pastebin.com/H9USgbzm
I believe on line 1242 is where the scan command is "executed".
The odd thing is that I have paired one device (bluetooth speakers) in the past, and I am able to use them perfectly. Connect/disconnect and playing audio works exactly as expected.
Last edited by Mattwamster58 (2023-02-05 03:35:32)
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If anyone is having this issue, best I can tell it was a regression introduced in a recent kernel version...
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