Hello from ubuntu 20.04, I found the same "ALSA woke us up....Most likely this is a bug in the ALSA driver 'snd_hda_intel'....." in syslog.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/320875 Title: pulseaudio produces lots of log messages Status in ALSA driver: New Status in linux package in Ubuntu: Fix Released Status in pulseaudio package in Ubuntu: Fix Released Bug description: Binary package hint: pulseaudio pulseaudio 0.9.14-0ubuntu1 produces these log messages: alsa-util.c: Cannot find fallback mixer control "PCM" or mixer control is no combination of switch/volume. alsa-util.c: snd_pcm_avail_update() returned a value that is exceptionally large: 412788 bytes (780 ms) Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers. and thousands of this: module-alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write! Most likely this is an ALSA driver bug. Please report this issue to the PulseAudio developers. With pulseaudio 0.9.14-0ubuntu2 the error message changed to: module-alsa-sink.c: ALSA woke us up to write new data to the device, but there was actually nothing to write! Most likely this is an ALSA driver bug. Please report this issue to the ALSA developers. We were woken up with POLLOUT set -- however a subsequent snd_pcm_avail_update() returned 0. With pulseaudio 0.9.14-0ubuntu1 I have only these log messages, but no sound glitches any more. $ cat /proc/asound/cards 0 [Audigy2 ]: Audigy2 - Audigy 4 [SB0610] Audigy 4 [SB0610] (rev.0, serial:0x10211102) at 0x1000, irq 21 To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/320875/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
