Source: linux
Version: 6.12.88+deb13-amd64
Followup-For: Bug #1136889
X-Debbugs-Cc: [email protected], [email protected]
User: [email protected]
Usertags: amd64
Dear Maintainer,
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
* What exactly did you do (or not do) that was effective (or
ineffective)?
* What was the outcome of this action?
* What outcome did you expect instead?
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-- System Information:
Debian Release: 13.5
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 6.12.74+deb13+1-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Same issue reproduced here.
Hardware:
HP ProBook 465 G11
MediaTek MT7921 Bluetooth/Wi-Fi
Broken kernel:
6.12.88+deb13-amd64
Working kernel:
6.12.74+deb13+1-amd64
Symptoms:
* bluetoothctl: "No default controller available"
* btmgmt info: "Index list with 0 items"
Relevant dmesg output:
Bluetooth: hci0: Failed to send wmt func ctrl (-22)
Issue disappears completely after booting older kernel.
Firmware packages installed:
* firmware-mediatek
* firmware-linux
* firmware-linux-nonfree
* firmware-misc-nonfree
Troubleshooting attempted:
* restart bluetooth.service
* reload btusb/btmtk modules
* full poweroff
* unplugging USB hub/peripherals
Regression reproducible consistently on 6.12.88 only.
