You have to post output of alsa-info.sh Which card is your default sink?
Seem fail with surround21 but does your card suppport multichannel? ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1562208 Title: OpenAL Software Silent/Freezes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openal-soft/+bug/1562208/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs