Comment 21 for bug 1998103

So today, everything is working fine.
pause music, step away from PC to have a snack & coffee.
During that time this happened in the logs:

Dec 01 15:59:41 HESSEL-MSI-MINT kernel: Bluetooth: hci0: command 0x0804 tx timeout
Dec 01 15:59:46 HESSEL-MSI-MINT bluetoothd[987]: profiles/audio/avdtp.c:cancel_request() Start: Connection timed out (110)
Dec 01 15:59:46 HESSEL-MSI-MINT pulseaudio[3495]: Transport Acquire() failed for transport /org/bluez/hci0/dev_40_ED_98_1A_3F_39/sep7/fd0 (Input/output error)
Dec 01 15:59:46 HESSEL-MSI-MINT pulseaudio[3495]: Transport Acquire() failed for transport /org/bluez/hci0/dev_40_ED_98_1A_3F_39/sep7/fd0 (Operation Not Authorized)
Dec 01 15:59:46 HESSEL-MSI-MINT bluetoothd[987]: profiles/audio/a2dp.c:a2dp_resume() avdtp_start failed
Dec 01 15:59:48 HESSEL-MSI-MINT bluetoothd[987]: profiles/audio/avdtp.c:cancel_request() Abort: Connection timed out (110)

Me being oblivious, comes back, hits play, blasts Motionless in White through the speakers to my open plan office.

then these logs shows up:
Dec 01 16:03:03 HESSEL-MSI-MINT pulseaudio[3495]: Refused to switch profile to a2dp_sink: Not connected
Dec 01 16:03:06 HESSEL-MSI-MINT pulseaudio[3495]: Refused to switch profile to a2dp_sink: Not connected

And now attempting to reconnect Blueman fails with Adapter not powered (and device is not soft/hard blocked)

Then if I attempt to turn it on via bluetoothctl:
Agent registered
[bluetooth]# power on
Failed to set power on: org.bluez.Error.Busy