6.11.3 -> 6.11.4 update broke bluetooth scanning for mt7922. 09:00.0 Network controller: MEDIATEK Corp. MT7922 802.11ax PCI Express Wireless Network Adapter Subsystem: Foxconn International, Inc. Device e0cd Kernel driver in use: mt7921e Kernel modules: mt7921e With 6.11.3: $ dmesg| grep -i bluetooth [ 5.170554] Bluetooth: Core ver 2.22 [ 5.170762] NET: Registered PF_BLUETOOTH protocol family [ 5.170949] Bluetooth: HCI device and connection manager initialized [ 5.171130] Bluetooth: HCI socket layer initialized [ 5.171313] Bluetooth: L2CAP socket layer initialized [ 5.171495] Bluetooth: SCO socket layer initialized [ 6.574657] Bluetooth: hci0: HW/SW Version: 0x008a008a, Build Time: 20240716163633 [ 6.614305] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 6.614311] Bluetooth: BNEP filters: protocol multicast [ 6.614316] Bluetooth: BNEP socket layer initialized [ 27.410062] Bluetooth: hci0: Device setup in 20480957 usecs [ 27.410070] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection command is advertised, but not supported. [ 27.687794] Bluetooth: hci0: AOSP extensions version v1.00 [ 27.687800] Bluetooth: hci0: AOSP quality report is supported [ 27.687914] Bluetooth: MGMT ver 1.23 [ 27.687951] Bluetooth: ISO socket layer initialized [ 27.784423] Bluetooth: RFCOMM TTY layer initialized [ 27.784430] Bluetooth: RFCOMM socket layer initialized [ 27.784432] Bluetooth: RFCOMM ver 1.11 [ 27.955038] Bluetooth: hci0: Invalid LTK for a8:79:8d:fe:ef:cb
With 6.11.4 # btmon Bluetooth monitor ver 5.78 btmon[3582]: = Note: Linux version 6.11.4-gentoo (x86_64) 0.553232 btmon[3582]: = Note: Bluetooth subsystem version 2.22 0.553233 = New Index: 10:B1:DF:B8:17:42 (Primary,USB,hci0) [hci0] 0.553234 = Open Index: 10:B1:DF:B8:17:42 [hci0] 0.553234 = Index Info: 10:B1:DF:B8:17:42 (MediaTek, Inc.) [hci0] 0.553234 bluetoothd[1187]: @ MGMT Open: bluetoothd (privileged) version 1.23 {0x0001} 0.553235 bluetoothd[1187]: @ MGMT Command: Start Discovery (0x0023) plen 1 {0x0001} [hci0] 12.563728 Address type: 0x07 BR/EDR LE Public LE Random @ MGMT Event: Command Complete (0x0001) plen 4 {0x0001} [hci0] 12.563758 Start Discovery (0x0023) plen 1 Status: Success (0x00) Address type: 0x07 BR/EDR LE Public LE Random @ MGMT Event: Discovering (0x0013) plen 2 {0x0001} [hci0] 12.563764 Address type: 0x07 BR/EDR LE Public LE Random Discovery: Enabled (0x01) And nothing more appears.
Connecting to paired devices is broken as well.
Reverting e63125eec47dcc169cf62a2a56448bec92a0a271 makes it work.
Thank you for your report and pinpointing the breaking commit. It’s a known regression, and commit 4084286151 (Bluetooth: btusb: Fix not being able to reconnect after suspend) [1] should fix it. It was queued as a 6.11-stable review patch yesterday, and should make it into Linux 6.11.5. [1]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4084286151fc91cd093578f615bfb68f9efbbfcb [2]: https://lore.kernel.org/stable/20241021102303.120595342@linuxfoundation.org/T/#u
Thanks for the feedback! Can confirm 4084286151fc91cd093578f615bfb68f9efbbfcb fixes this problem as well.