you have to post the pulseaudio verbose log https://wiki.ubuntu.com/PulseAudio/Log
did you find any error messages in the pukseaudio log when you play multi channel ? alsa-sink] (alsa-lib)pcm_hw.c: SNDRV_PCM_IOCTL_START failed (-77) https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1289811 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1315212 Title: [CA0106 - CA0106, playback] Playback problem - Surround dies, no valid output To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1315212/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
