Same here. The device is a BT headset adapter w/ microphone listed as
BT-QC15
$ hciconfig hci0 -a
hci0: Type: Primary Bus: USB
BD Address: 08:BF:B8:54:E3:14 ACL MTU: 1021:6 SCO MTU: 255:12
UP RUNNING PSCAN
RX bytes:17939700 acl:596 sco:3776 events:2459330 errors:0
TX bytes:-2103428979 acl:2435145 sco:3700 commands:12735 errors:0
Features: 0xff 0xff 0xff 0xfe 0xdb 0xfd 0x7b 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: PERIPHERAL ACCEPT
Name: '(hci0)'
Class: 0x7c0104
Service Classes: Rendering, Capturing, Object Transfer, Audio, Telephony
Device Class: Computer, Desktop workstation
HCI Version: 5.1 (0xa) Revision: 0xdfc6
LMP Version: 5.1 (0xa) Subversion: 0xd922
Manufacturer: Realtek Semiconductor Corporation (93)
...
[97082.822502] Bluetooth: hci0: SCO packet for unknown connection handle 1
...
[97106.662695] Bluetooth: hci0: SCO packet for unknown connection handle 2
[97106.664799] Bluetooth: hci0: Opcode 0x0406 failed: -107
...
[97135.847813] Lockdown: systemd-logind: hibernation is restricted; see man
kernel_lockdown.7
[97135.849863] Lockdown: systemd-logind: hibernation is restricted; see man
kernel_lockdown.7
[97135.849997] Lockdown: systemd-logind: hibernation is restricted; see man
kernel_lockdown.7
[97135.850126] Lockdown: systemd-logind: hibernation is restricted; see man
kernel_lockdown.7
[97135.850136] Lockdown: systemd-logind: hibernation is restricted; see man
kernel_lockdown.7
[97135.914992] input: BT-QC15 (AVRCP) as /devices/virtual/input/input40
[97138.114242] audit: type=1400 audit(1774198879.392:400): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.114551] audit: type=1400 audit(1774198879.392:401): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.147839] audit: type=1400 audit(1774198879.426:402): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.148135] audit: type=1400 audit(1774198879.426:403): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.180522] audit: type=1400 audit(1774198879.458:404): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.180852] audit: type=1400 audit(1774198879.459:405): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.225299] audit: type=1400 audit(1774198879.503:406): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.226135] audit: type=1400 audit(1774198879.504:407): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.226534] audit: type=1400 audit(1774198879.504:408): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
[97138.227407] audit: type=1400 audit(1774198879.505:409): apparmor="DENIED"
operation="getattr" class="posix_mqueue" info="Failed name lookup -
disconnected IPC path" error=-13 profile="plasmashell" pid=147836
comm="plasmashell" requested="getattr" denied="getattr" class="posix_mqueue"
fsuid=1000 ouid=0
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https://bugs.launchpad.net/bugs/1430696
Title:
Bluetooth audio instability: Bluetooth: hci0 SCO packet for unknown
connection handle
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