Audio playback to a Bluetooth headset (BH-M20C) on Kevin stalls after multiple suspend/resume cycles (in an attempt to reproduce b/63782186).

Build: 9799.0.2017_08_01_1333 (Test Build - mka) developer-build kevin
Steps:

1) Pair the Bluetooth headset
2) Perform multiple suspend/resume cycles
3) play /usr/share/chromeos-assets/input_methods/input_tools/sounds/audio_initiate.wav

Expected result: audio_initiate.wav is played on the BT headset
Actual result: play blocks, has to be terminated with kill -9

According to the GUI the headset is paired and audio output is routed to Bluetooth. The blue LED on the headset blinks slowly, which indicates that the headset hasn't switched off.

bluetoothctl shows information on available BT devices, so apparently communication with the BT controller is working.

[BH-M20C]# info
Device 00:6A:8E:16:E6:D1
	Name: BH-M20C
	Alias: BH-M20C
	Class: 0x240404
	Icon: audio-card
	Paired: yes
	Trusted: yes
	Blocked: no
	Connected: yes
	LegacyPairing: no
	UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
	UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
	UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)

 

Audio playback to a Bluetooth headset (BH-M20C) on Kevin stalls after multiple suspend/resume cycles (in an attempt to reproduce b/63782186).

Build: 9799.0.2017_08_01_1333 (Test Build - mka) developer-build kevin:

Steps:

1) Pair the Bluetooth headset
2) Perform multiple suspend/resume cycles
3) play /usr/share/chromeos-assets/input_methods/input_tools/sounds/audio_initiate.wav

Expected result: audio_initiate.wav is played on the BT headset
Actual result: play blocks, has to be terminated with kill -9

According to the GUI the headset is paired and audio output is routed to Bluetooth. The blue LED on the headset blinks slowly, which indicates that the headset hasn't switched off.

bluetoothctl shows information on available BT devices, so apparently communication with the BT controller is working.

[BH-M20C]# info
Device 00:6A:8E:16:E6:D1
	Name: BH-M20C
	Alias: BH-M20C
	Class: 0x240404
	Icon: audio-card
	Paired: yes
	Trusted: yes
	Blocked: no
	Connected: yes
	LegacyPairing: no
	UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
	UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
	UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)