On 11/17/25 10:42, Thorsten Leemhuis wrote:

On 11/17/25 02:30, incogcyberpunk@proton.me wrote:

...

#regzbot introduced: v6.13.1..v6.13.2

Distro: Arch Linux  Kernel: since v6.13.2

Lo! Thx for the report. It's unlikely that any developer will look into this report[1] as 6.13.y is ancient by kernel development standards and EOL for quite a while.

Please check if the latest stable version is still affected; if it is, ideally try latest mainline (6.18-rc6), too. If that is as well, it would be great if you could bisect between 6.13.1 and 6.13.2.

TWIMC, IncogCyberpunk replied in private to me and wrote:

""" Sorry, if I was not clear but, the problem persists in both the stable (v6.17.8) and the latest mainline (v6.18-rc6) linux kernels as of Nov 2025 """

Please reply in public next time. And no problem, but quite a few people write "since v6.13.2" and only mean later 6.13 versions, that's why I asked.

You might want to provide the logs from 6.18-rc6. Then feel free to wait two or three days to see if a developer replies. If not, please bisect the problem between 6.13.1 and 6.13.2 – and then try if reverting the culprit in mainline fixes the problem (if it's possible to revert it there easily). For details, see: https://docs.kernel.org/admin-guide/verify-bugs-and-bisect-regressions.html

HTH, ciao, Thorsten

...

The bluetooth adapter would be recognized and the bluetooth worked flawlessly till v6.13.1 , but since the v6.13.2 , the bluetooth adapter doesn't get recognized by the bluetooth service and therefore the bluetooth functionality doesn't work .

I suspect the bluetooth's driver failing to load at the kernel-level.

• The output of |bluetoothctl|​ :

$: bluetoothctl Agent registered [bluetoothctl]> list [bluetoothctl]> devices No default controller available [bluetoothctl]>

• The output of |systemctl status bluetooth.service|​ :

● bluetooth.service - Bluetooth service      Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: disabled)      Active: active (running) since Sat 2025-11-15 22:57:00 +0545; 1 day 8h ago  Invocation: bddf190655fd4a4290d41cde594f2efa        Docs: man:bluetoothd(8)    Main PID: 617 (bluetoothd)      Status: "Running"       Tasks: 1 (limit: 18701)      Memory: 2.8M (peak: 3.8M)         CPU: 38ms      CGroup: /system.slice/bluetooth.service              └─617 /usr/lib/bluetooth/bluetoothd

Nov 15 22:57:00 Incog systemd[1]: Starting Bluetooth service... Nov 15 22:57:00 Incog bluetoothd[617]: Bluetooth daemon 5.84 Nov 15 22:57:00 Incog systemd[1]: Started Bluetooth service. Nov 15 22:57:00 Incog bluetoothd[617]: Starting SDP server Nov 15 22:57:00 Incog bluetoothd[617]: Bluetooth management interface 1.23 initialized

• The output of |lspci|​ is attached below .

• The logs for |journalctl -b|​ for both v6.13.1 and v6.13.2 are attached below.

Regards, IncogCyberpunk