I can reproduce it on my lenovo X240 with 16.04.1 and pulseaudio 1:8.0-0ubuntu3 + "Plantronics BackBeat Go 2",
There are brief description of my understanding by adding debug message there[1]. The correct path to set channels looks should be setup_transport() -> transport_config() However, it would get a return (-1) in setup_transport() -> transport_acquire(u, true); But that (-1) return value not be handled and transport_config(u); is the expected next step. But somehow the flow get into profile_new_connection() -> rfcomm_io_callback() -> transport_speaker_gain_changed_cb() ->pa_cvolume_set() -> get channels 0 assertion instead of expected flow: setup_transport() -> transport_config() So, might worth to check why these message was printed: ( 19.680| 0.000) I: [pulseaudio] backend-native.c: doing connect ( 19.755| 0.075) E: [pulseaudio] backend-native.c: connect(): Function not implemented What looks need to check but I do check yet: 1. remove patches after 0600-droid-sync-with-upstream-for-Android-5-support-and-b.patch to check if it works. 2. remove patches after 0501-bluetooth-bluez5-ofono-add-support-for-HFP-gateway-r.patch to check if it works. 3. based 1, or 2. to check if it could get transport_config() without error. this is my debug message of pulseaudio: http://paste.ubuntu.com/23266287/ and I followed the way[2] to execute pulseaudio manually by : $/usr/bin/pulseaudio -vvvv --log-level=debug --log-target=newfile:/tmp/pulseverbose.log --log-time=1 [1] https://code.launchpad.net/~alextu/pulseaudio/+git/lp1574324_bt_headset_crashed/+ref/master [2] https://wiki.ubuntu.com/PulseAudio/Log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1574324 Title: pulseaudio crashes when connecting to bluetooth headphones (due to ubuntu changes?) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1574324/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
