Comment 0 for bug 1829737

For kernel version >= @TO_BE_FILLED@, it fails to pair with BT4.0 HID devices and leave error messages in syslog:

  Bluetooth: hci0: request failed to create LE connection: status 0x0c

Which can be detailed by btmon:

  < HCI Command: LE Extended Create Connection (0x08|0x0043) plen 26 #800 [hci0] 30.895622
        Filter policy: White list is not used (0x00)
        Own address type: Public (0x00)
        Peer address type: Random (0x01)
        Peer address: DB:DD:51:2D:1C:CC (Static)
        Initiating PHYs: 0x01
        Entry 0: LE 1M
          Scan interval: 60.000 msec (0x0060)
          Scan window: 60.000 msec (0x0060)
          Min connection interval: 30.00 msec (0x0018)
          Max connection interval: 50.00 msec (0x0028)
          Connection latency: 0 (0x0000)
          Supervision timeout: 420 msec (0x002a)
          Min connection length: 0.000 msec (0x0000)
          Max connection length: 0.000 msec (0x0000)
  > HCI Event: Command Status (0x0f) plen 4 #801 [hci0] 30.896453
      LE Extended Create Connection (0x08|0x0043) ncmd 1
        Status: Command Disallowed (0x0c)

Indicating this is actually a firmware problem.

Verified this has been fixed at least in upstream linux-firmware commit 29a536a02cadb75b84c6c0b5d7af22d34d278563, firmware release version 21.10.0.6. With that firmware blob placed under /lib/firmware/intel and a cold boot, dmesg gives updated revision and device pairing works as expected:

  Firmware revision 0.1 build 184 week 15 2019