New state:

Sound stuttered again at 12:23

I attached part of syslog

After doing
echo 27 > /proc/asound/card1/pcm0p/xrun_debug
it started to output many lines to syslog every second

Now after stuttering I didn't notice strings with "[alsa-sink-ALC271X
Analog] alsa-util.c: snd_pcm_avail() returned a value that is
exceptionally large", but I noticed, that after 12:23:45 it was 5
seconds without any log and after that at 12:23:50 there are these
strings:

Jan 30 12:23:50 bazilio-laptop kernel: [ 6672.962574] ath: phy0: Chip reset 
failed
Jan 30 12:23:50 bazilio-laptop kernel: [ 6672.962581] ath: phy0: Unable to 
reset channel, reset status -22
Jan 30 12:23:50 bazilio-laptop kernel: [ 6672.962726] ath: phy0: Unable to set 
channel

Is it about network?

Now I think strings about "snd_pcm_avail() returned a value that is 
exceptionally large" and sound stuttering are not interdependent.
I think that sound stuttering becouse there is some problems with "ath: phy0: 
Chip reset failed"
If so I'll have to fire another bug to another project, isn't it?

Can you help me to approve it?

** Attachment added: "syslog_27.txt"
   
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1274115/+attachment/3962457/+files/syslog_27.txt

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https://bugs.launchpad.net/bugs/1274115

Title:
  snd_pcm_avail() returned a value that is exceptionally large

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