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Groups > linux.debian.kernel > #92566

Bug#1136941: Regression: Bluetooth fails on MediaTek card (Framework 13 AMD) with wmt func ctrl error

Cross-posted to 2 groups.

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Source: linux
Version: 6.12.88+deb13-amd64
Severity: important
X-Debbugs-Cc: jakubzeman@gmail.com

Dear Maintainer,

After a recent package upgrade to kernel version 6.12.88+deb13-amd64 on my Framework 13 AMD laptop (Ryzen AI 300 Series), Bluetooth completely stopped working.

When booting into the previous kernel version (6.12.86+deb13-amd64), Bluetooth initializes perfectly, confirming a regression in the 6.12.88 build.

Running 'sudo dmesg | grep -i blue' under the faulty 6.12.88 kernel shows the following hardware error:
[   14.954152] Bluetooth: hci0: Failed to send wmt func ctrl (-22)
[   14.954161] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported.

-- System Information:
Debian Release: 13.5
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.86+deb13-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

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Bug#1136941: Regression: Bluetooth fails on MediaTek card (Framework 13 AMD) with wmt func ctrl error Jakub Zeman <jakubzeman@gmail.com> - 2026-05-17 14:50 +0200
  Bug#1136941: marked as done (Regression: Bluetooth fails on  MediaTek card (Framework 13 AMD) with wmt func ctrl error) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-22 08:30 +0200

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