Possible bug: [notification] sounds do not play over Bluetooth audio devices

[strictlyrude27]

This is a follow-up to this thread: https://groups.google.com/forum/#!topic/tasker/SztowbuhRlk

Today I finally got the time to get a logcat of what happens when trying to play a notification sound over a Bluetooth headset. See here: http://pastebin.com/HC9W61at . The problem persists across multiple Bluetooth audio devices. Note that I can go into my device Settings and play notifications all I want. Same goes if I turn on notification sounds from my SMS app. This is why I believe this is a bug in Tasker rather than specific to my BT devices or my handset.

I explicitly tested the task action "Music Play" (notification stream). Here's what I think the interesting tidbit from the logcat, although I don't know if any of this is useful information (or if the pastebin is useful, either):

D/audio_hw_primary(  187): disable_snd_device: snd_device(2: speaker)

I/audio_a2dp_hw(  187): suspend_audio_datapath: state 1

E/bt-btif (31610): bta_av_str_stopped:audio_open_cnt=1, p_data ac429774

W/bt-btif (31610): bta_dm_rm_cback:1, status:6

W/bt-btif (31610): ### UNDERFLOW :: ONLY READ 0 BYTES OUT OF 512 ###

W/bt-btif (31610): btif_media_aa_prep_sbc_2_send underflow 3, 0

W/bt-btif (31610): ### UNDERFLOW :: ONLY READ 0 BYTES OUT OF 512 ###

W/bt-btif (31610): btif_media_aa_prep_sbc_2_send underflow 10, 0

E/bt-btif (31610): btif_get_num_aa_frame() - Limiting frames to be sent from 17 to 10

W/bt-btif (31610): ### UNDERFLOW :: ONLY READ 0 BYTES OUT OF 512 ###

W/bt-btif (31610): btif_media_aa_prep_sbc_2_send underflow 10, 0

W/bt-btif (31610): bta_dm_rm_cback:1, status:6

I/BluetoothA2dpServiceJni(31610): bta2dp_audio_state_callback

D/A2dpStateMachine(31610): Connected process message: 101

W/bt-btif (31610): overflow 0, enter 0, exit 0

W/bt-btif (31610): pcm bytes per tick 3528

E/bt-btif (31610): ERROR Media task Scheduled after Suspend

D/A2dpStateMachine(31610): A2DP Playing state : device: 48:C1:AC:7B:57:D0 State:10->11

I/audio_a2dp_hw(  187): skt_disconnect: fd 19

Running Android 5.0.1, Nexus 5, Tasker 4.6u1m

Pent, it'd be much appreciated if you could take a look at this?

[strictlyrude27]

can anybody comment on this? Am I going down the wrong track? I definitely know notification sounds aren't being played over BT audio, is this something known and I'm just doing it wrong??

[David Lu]

I have similar issue with A2DP music streaming.

From my understanding, HS was trying to send stream via A2DP after received a "suspend" AVDTP Signaling message from HU. 

I/audio_a2dp_hw(  187): suspend_audio_datapath: state 1

E/bt-btif (31610): ERROR Media task Scheduled after Suspend

But refer to AVDTP protocol, as an acceptor(ACP), HU shouldn't send suspend command. It should be a HU bug.

AVDTP protocol can be find here: 

https://developer.bluetooth.org/TechnologyOverview/Pages/AVDTP.aspx