Since kernel 5.17, some users are seeing problems connecting to bluetooth devices, the problem doesn't happen with 5.16 series kernels. So far two different devices are affected, although it's possible it's not even device related, but could be the interface between kernel and user space. Case 1: Bus 001 Device 003: ID 0cf3:e301 Qualcomm Atheros Communications Not seeing anything that stands out in dmesg, bluetoothd -d shows various curious messages like bluetoothd[5889]: src/service.c:change_state() 0x7f33becdebc0: device 94:65:2D:DC:F4:A7 profile avrcp-controller state changed: disconnected -> unavailable (0) and bluetoothd[5889]: src/service.c:change_state() 0x7f33becd91e0: device 94:65:2D:DC:F4:A7 profile Hands-Free Voice gateway state changed: unavailable -> disconnected (0) Case 2: Bus 001 Device 005: ID 8087:0aaa Intel Corp. Bluetooth 9460/9560 Jefferson Peak (JfP) [ 5.923865] kernel: Bluetooth: hci0: Found device firmware: intel/ibt-17-16-1.sfi [ 5.930536] kernel: Bluetooth: hci0: Boot Address: 0x40800 [ 5.930539] kernel: Bluetooth: hci0: Firmware Version: 60-44.21 ... [16102.640651] Bluetooth: hci0: unexpected event 0xff length: 5 > 0 [16102.640802] Bluetooth: hci0: Waiting for device to boot [16102.654712] Bluetooth: hci0: Device booted in 13698 usecs [16102.654753] Bluetooth: hci0: unexpected event 0xff length: 7 > 0 [16102.655907] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-17-16-1.ddc [16102.657821] Bluetooth: hci0: Applying Intel DDC parameters completed [16102.658829] Bluetooth: hci0: Firmware revision 0.1 build 60 week 44 2021 [17422.210558] Bluetooth: hci0: command 0x0c03 tx timeout [17430.338412] Bluetooth: hci0: HCI reset during shutdown failed [15975.194153] bluetoothd[42895]: src/adapter.c:device_found_callback() hci0 addr 75:0B:19:0C:47:F6, rssi -82 flags 0x0000 eir_len 17 [15975.194412] bluetoothd[42895]: src/adv_monitor.c:btd_adv_monitor_offload_supported() Manager is NULL, get offload support failed [15975.194510] bluetoothd[42895]: src/device.c:device_set_legacy() legacy 0 [15975.194599] bluetoothd[42895]: src/device.c:device_set_rssi_with_delta() rssi -82 delta 1 [15975.194661] bluetoothd[42895]: src/device.c:device_set_flags() flags 26 There are many many of the "Manager is NULL, get offload support failed" messages in this case. I'm not entirely sure the root causes are the same for the two cases. Downstream bug has attachments (dmesg, btmon, lsbsb, journalctl snippet with bluetoothd in debug, for both) https://bugzilla.redhat.com/show_bug.cgi?id=2053283 Thanks, -- Chris Murphy
