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[Bug 329620] Re: ALSA woke us up to write new data to the device, but there was actually nothing to write.

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Lee H <leehodg@xxxxxxxxx>
Date: Sat, 21 Dec 2013 10:42:20 -0000
Reply-to: Bug 329620 <329620@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

*** This bug is a duplicate of bug 320875 ***
    https://bugs.launchpad.net/bugs/320875

On Ubuntu 12.04.3, I'm seeing

 [alsa-source] alsa-source.c: ALSA woke us up to read new data from the device, but there was actually nothing to read!
[alsa-source] alsa-source.c: Most likely this is a bug in the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA developers.
 [alsa-source] alsa-source.c: We were woken up with POLLIN set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail.

in the syslog. It also seems I have no access to the usual alsamixer
volume controls on running alsamixer.

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https://bugs.launchpad.net/bugs/329620

Title:
  ALSA woke us up to write new data to the device, but there was
  actually nothing to write.

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Hello everyone,

  I was going over my log messages and found out this entry appears a
  few times in the "user.log" file:

  Feb 14 19:08:05 LaptopLinux pulseaudio[21013]: 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.
  Feb 14 19:10:23 LaptopLinux pulseaudio[21013]: module-alsa-sink.c: Increasing wakeup watermark to 40.41 ms
  Feb 14 20:35:07 LaptopLinux pulseaudio[21013]: module-alsa-sink.c: Increasing wakeup watermark to 80.82 ms

  You can find the complete log file attached.  Let me know if you guys
  need more info.

  By the way I am running Jaunty x86_64 with 2.6.28-7-generic kernel.

  kermana@LaptopLinux:~$ aplay -l
  **** List of PLAYBACK Hardware Devices ****
  card 0: Intel [HDA Intel], device 0: ALC262 Analog [ALC262 Analog]
    Subdevices: 1/1
    Subdevice #0: subdevice #0
  card 1: HDMI [HDA ATI HDMI], device 3: ATI HDMI [ATI HDMI]
    Subdevices: 1/1
    Subdevice #0: subdevice #0

  kermana@LaptopLinux:~$ lsmod | grep snd
  snd_seq_dummy          11524  0
  snd_hda_intel         545588  3
  snd_seq_oss            41856  0
  snd_pcm_oss            52224  0
  snd_seq_midi           15744  0
  snd_mixer_oss          24960  1 snd_pcm_oss
  snd_pcm                98952  2 snd_hda_intel,snd_pcm_oss
  snd_rawmidi            33920  1 snd_seq_midi
  snd_seq_midi_event     16512  2 snd_seq_oss,snd_seq_midi
  snd_seq                66144  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
  snd_timer              34064  2 snd_pcm,snd_seq
  snd_seq_device         16276  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
  snd                    78792  15 snd_hda_intel,snd_seq_oss,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
  soundcore              16800  1 snd
  snd_page_alloc         18704  2 snd_hda_intel,snd_pcm

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