Public bug reported: I have a working solution, somebody at https://answers.launchpad.net/ubuntu/+source/alsa- driver/+question/266299 suggested I file a bug report. From that:
I am using an Intel NUC with internal WiFi/Bluetooth and Seiki TV as a monitor, Ubuntu 14.04.2 64-bit with all recent updates and no particular customization but with blueman installeds. When I disconnect the Bluetooth headset, all audio stops working. Reproduce-by: * Reboot and log in. * "System settings > Sound" shows "HDMI/DisplayPort built-in audio" * "Test Sound > Test (Front Left)" works * Power-on BT headset * Open terminal * Run "pulseaudio --kill" * Wait... "Headset MW600" appears in "System settings > Sound" * Select "Headset MW600" * "Test Sound > Test (Mono)" works * Power-off BT headset * [optional, does not change result] run "pulseaudio --kill" * Select "HDMI/DisplayPort built-in audio" * "Test Sound > Test (Front Left)" causes "System settings" to gray out a long time (e.g., a minute) * Sound is no longer working in any obvious way Via https://help.ubuntu.com/community/SoundTroubleshootingProcedure I did wget -O alsa-info.sh http://www.alsa-project.org/alsa-info.sh && chmod +x ./alsa-info.sh && ./alsa-info.sh It brings up a first screen "This script visits the following ... to collect diagnostic information ..." I clicked <OK> and it apparently just hangs. I can Ctrl-C it. If I run 'top', pulseaudio is about 1% of CPU on an ongoing basis. This seems high to me. The instructions here say "what you think should happen instead", which is: I should be able to power-off the BT headset and audio should keep working. I had installed blueman while chasing another problem. When I removed blueman (as in sudo apt-get remove blueman) the symptom above went away. So for my needs, I'd say this is "fixed", but it also seems undesirable to have situations where things go bad with a hang. If somebody thinks this is worth chasing, I can re-install blueman and run tests people suggest to help diagnose the problem. Release: 14.04.2 Version: pulseaudio: Installed: 1:4.0-0ubuntu11.1 Candidate: 1:4.0-0ubuntu11.1 Version table: *** 1:4.0-0ubuntu11.1 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages 100 /var/lib/dpkg/status 1:4.0-0ubuntu11 0 500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages ** Affects: alsa-driver (Ubuntu) Importance: Undecided Status: New ** Tags: hang sound -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1451204 Title: Sounds stops on BT headset removed, if blueman installed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1451204/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
