Control: forcemerge 1136790 1136945 Hi
On Sun, May 17, 2026 at 03:20:52PM +0200, Roman Hocke wrote: > Package: linux > Version: 6.12.88-1 > Severity: important > Hardware: Lenovo IdeaPad, MediaTek MT7961 (USB ID 0e8d:e0cd) > > Dear Maintainer, > > Bluetooth has stopped working on my system after upgrading the kernel from > 6.12.74+deb13+1 to 6.12.85+deb13 (and all subsequent versions up to and > including 6.12.88+deb13, the current one). Downgrading back to > 6.12.74+deb13+1 restores Bluetooth functionality. > > -- System information -- > > Kernel (broken): 6.12.88+deb13-amd64 > Kernel (working): 6.12.74+deb13+1-amd64 > Bluetooth chip: MediaTek MT7961 (USB ID 0e8d:e0cd, PCI: mt7921e, > ASIC revision 79610010) > Firmware package: firmware-mediatek (reinstallation did not help) > Distro: Debian 13 (trixie) > > -- Symptom -- > > Bluetooth adapter is detected but fails to initialize. The following > errors appear in dmesg on the broken kernels: > > Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20241106151414 > Bluetooth: hci0: Failed to send wmt func ctrl (-22) > Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is > advertised, but not supported. > > rfkill shows no block (soft or hard). The bluetooth.service is running. > Reinstalling firmware-mediatek had no effect. This is already known, merging with #1136945. Please check always for existing bugreports and followup on them. Regards, Salvatore
