I am using fully patched / updated Ubuntu 21.04 + KDE 5.21.4 on Lenovo Thinkpad X1 extreme Gen 3. Kernel in use is 5.11.0-37-generic, with latest firmware for the System (0.1.17) and Intel (225.53.1649).
I am trying to use OnePlus buds Z with the laptop and they keep randomly disconnecting every once in a while. I have not seen this issue when I use them with my phone; so I believe the buds are fine.
Here are the logs:
> journalctl -r -n 12000 | grep bluetooth
Sep 29 14:18:24 Matrix bluetoothd[792]: /org/bluez/hci0/dev_E4_41_22_45_85_0D/sep1/fd4: fd(40) ready
Sep 29 14:18:18 Matrix bluetoothd[792]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to E4:41:22:45:85:0D: Connection timed out (110)
Sep 29 14:17:55 Matrix dbus-daemon[794]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.72" (uid=1000 pid=1493 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.5" (uid=0 pid=792 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
Sep 29 13:39:15 Matrix bluetoothd[792]: /org/bluez/hci0/dev_E4_41_22_45_85_0D/sep1/fd3: fd(40) ready
Sep 29 13:39:07 Matrix bluetoothd[792]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to E4:41:22:45:85:0D: Connection timed out (110)
Sep 29 13:38:42 Matrix dbus-daemon[794]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.72" (uid=1000 pid=1493 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.5" (uid=0 pid=792 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
Sep 29 13:38:42 Matrix bluetoothd[792]: profiles/audio/avdtp.c:handle_unanswered_req() No reply to Suspend request
Sep 29 13:38:42 Matrix bluetoothd[792]: profiles/audio/avdtp.c:cancel_request() Suspend: Connection timed out (110)
Sep 29 13:30:06 Matrix bluetoothd[792]: /org/bluez/hci0/dev_E4_41_22_45_85_0D/sep1/fd2: fd(40) ready
Sep 29 13:29:58 Matrix bluetoothd[792]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to E4:41:22:45:85:0D: Host is down (112)
Sep 29 13:29:39 Matrix bluetoothd[792]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to E4:41:22:45:85:0D: Connection timed out (110)
Sep 29 13:29:17 Matrix dbus-daemon[794]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.72" (uid=1000 pid=1493 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.5" (uid=0 pid=792 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
Sep 29 12:46:23 Matrix bluetoothd[792]: /org/bluez/hci0/dev_E4_41_22_45_85_0D/sep1/fd1: fd(40) ready
Sep 29 12:46:20 Matrix bluetoothd[792]: profiles/audio/avctp.c:avctp_control_confirm() Control: Refusing unexpected connect
Sep 29 12:45:59 Matrix bluetoothd[792]: profiles/audio/avdtp.c:avdtp_connect_cb() connect to E4:41:22:45:85:0D: Host is down (112)
Sep 29 11:38:43 Matrix dbus-daemon[794]: [system] Rejected send message, 0 matched rules; type="method_return", sender=":1.72" (uid=1000 pid=1493 comm="/usr/bin/pulseaudio --daemonize=no --log-target=jo" label="unconfined") interface="(unset)" member="(unset)" error name="(unset)" requested_reply="0" destination=":1.5" (uid=0 pid=792 comm="/usr/lib/bluetooth/bluetoothd " label="unconfined")
