Configuring Audio mutes ALSA, and all sound

[Traumflug]

Binary package hint: pulseaudio

Steps to reproduce:

1. Install Ubuntu 10.10.

2. Plug in an USB audio device, like one of these C-Media headsets.

3. Open gnome-volume-control to get that device into use, i.e. make it the default audio device.

4. Try to get test sounds, or any other audible feedbacks.

Result: total silence

Workaround - it took me days to track that down:

Go to terminal, type "alsamixer" and raise the volume level of that USB device. This lasts until you touch gnome-volume-control again.

Diagnosis:

- Flip a few switches in gnome-volume-control with alsamixer still opened and you'll see ALSA volume snapping down to zero again on some operations. Like when selecting the USB device as default device. No knob in this panel can get the ALSA volume back up.

- I've selected pulseaudio as the damaged package, as it's more likely a side effekt of the triggers gnome-volume-control pulls, than a fault of the panel it's self.

- This works fine in 10.04 LTS, so it's a regression.

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 10.10 (maverick) reached end-of-life on April 10, 2012.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

Please upgrade to the latest version and re-test.

[Launchpad Janitor (janitor)]

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