As I never figured out how to solve this problem, I switched to my Realtek-Onboard-Sound for a while. A few days ago I tried to use the CA0106 (SB Live!) again with 5.1 channels and noticed, that no more 100% CPU occured. Instead pulseaudio randomly crashed and sound suddenly stopped on any application.
/var/log/messages: "stale PID file, overwriting", due to the auto-respawn-option I guess. I deactivated that and started pulseaudio manually -vvvv: E: alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write! E: alsa-sink.c: Most likely this is a bug in the ALSA driver 'snd_ca0106'. Please report this issue to the ALSA developers. E: alsa-sink.c: We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail. D: protocol-native.c: Underrun on 'Audio Stream', 0 bytes in queue" Even when I tried to fix the 100% CPU thing, there were some thoughts about it being a CA0106 driver problem, and not really a pulseaudio issue. So I decided to try the upstream-version of linux-alsa-driver- modules, following this guide: https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules That did the job. No more 100% CPU, no more sudden crashes, everything is working fine now. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/466957 Title: pulseaudio takes 100 % CPU when using 5.1 profile -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
