When the device connects automatically (by powering on after being paired) A2DP is "unavailable".
To enable--and subsequently activate--the profile the device must be connected by explicitly giving the "connect 00:1F:82:28:93:51" command to bluetoothctl.
I had the same problem and can verify the same workaround with the following:
pulseaudio-git v7.0.34.g9d2b763-1
bluez 5.34-1
Device 00:1F:82:28:93:51 0000-1000- 8000-00805f9b34 fb) 0000-1000- 8000-00805f9b34 fb) 0000-1000- 8000-00805f9b34 fb) 0000-1000- 8000-00805f9b34 fb)
Name: DR-BT101
Alias: DR-BT101
Class: 0x240408
Icon: audio-card
Paired: yes
Trusted: yes
Blocked: no
Connected: yes
LegacyPairing: no
UUID: Headset (00001108-
UUID: Audio Sink (0000110b-
UUID: A/V Remote Control (0000110e-
UUID: Handsfree (0000111e-
When the device connects automatically (by powering on after being paired) A2DP is "unavailable".
To enable--and subsequently activate--the profile the device must be connected by explicitly giving the "connect 00:1F:82:28:93:51" command to bluetoothctl.