[Bug 320875] Re: pulseaudio produces lots of log messages

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.

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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

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