Sounds stops on BT headset removed, if blueman installed

[b00n]

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

[b00n (ub-0002)]

Tried utopic blueman (1.23-git201406261335-deb-1ubuntu1) and no hang but still odd behaviours.

See https://answers.launchpad.net/ubuntu/+source/alsa-driver/+question/266299 for details.

[Marcus Tomlinson (marcustomlinson)]

This release of Ubuntu is no longer receiving maintenance updates. If this is still an issue on a maintained version of Ubuntu please let us know.

[Launchpad Janitor (janitor)]

[Expired for alsa-driver (Ubuntu) because there has been no activity for 60 days.]