I am running Ubuntu 18.04 and have Sony WH-1000XM2 bluetooth headphones.
Bluetooth connection is established automatically but in order to get
any sound out of the headphones I need to:
1. Manually disconnect and reconnect the headphones from bluetooth
settings
or
2. Press play/pause button on my headphones (after this a2dp_sink is
available) and go to sound settings to select headphones as output
device.
After the bluetooth connection is automatically established I see the following
error message in system log:
pulseaudio[3124]: [pulseaudio] module-bluez5-device.c: Profile a2dp_sink has
no transport
The command "pacmd list-cards" displays the a2dp_sink as unavailable (full
device output attached):
...
profiles:
headset_head_unit: Headset Head Unit (HSP/HFP) (priority 30, available:
unknown)
a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 40, available: no)
...
After pressing play/pause button on the headphones or manually reconnecting,
a2dp_sink is available:
...
profiles:
headset_head_unit: Headset Head Unit (HSP/HFP) (priority 30, available:
unknown)
a2dp_sink: High Fidelity Playback (A2DP Sink) (priority 40, available: yes)
off: Off (priority 0, available: yes)
...
** Attachment added: "pacmd_list-cards_output"
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1724919/+attachment/5178575/+files/pacmd_list-cards_output
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https://bugs.launchpad.net/bugs/1724919
Title:
Bluetooth headphones only use A2DP when connected manually
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