This command doesn't work, it says "aplay: set_params:1239: Channels count non available". The -D default:CARD=CA0106 variant works and it does not overrun. I only had overruns on recording (at least, explicit). That said, I've made a huge improvement in my system, I compiled a pf- kernel and set CONFIG_PREEMPT=y, CONFIG_HZ_1000=y and CONFIG_HZ=1000. The default Debian kernel is on 250 Hz and is not preemptible. Now that my kernel supports preemption I (crossing fingers) don't have ALSA over- and underruns anymore. They were quite sudden and audible as clicks/gaps. I saw this in the log:
Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Scheduling delay of 11.42 ms > 11.31 ms, you might want to investigate this to improve latency... Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Underrun! Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Increasing minimal latency to 1.00 ms Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Latency set to 21.33ms Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: hwbuf_unused=57352 Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: setting avail_min=7651 Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: Latency set to 21.33ms Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: hwbuf_unused=57352 Jan 4 20:25:15 homecomp pulseaudio[26848]: [alsa-sink-ca0106] alsa-sink.c: setting avail_min=7651 With the preempt kernel this doesn't happen at all (I grepped the log) and sound is just as good as with pure ALSA. However, arecord still drops overrun for CA0106. It doesn't do it for PCH (ALC889) though. -- 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/alsa-driver/+bug/1315212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
