Bug#1019194: pulseaudio: ALSA woke us up to write new data to the device, but there was actually nothing to write.

[Arnaud Rebillout]

On Mon, 05 Sep 2022 12:04:12 +0200 Tobias Koeck <tkoeck at imap.a2gb.de> 
wrote:> Package: pulseaudio
 >
 > Sep 5 11:58:46 tron-nb pulseaudio[4602]: ALSA woke us up to write new 
data to the device, but there was actually nothing to write.
 > Sep 5 11:58:46 tron-nb pulseaudio[4602]: Most likely this is a bug in 
the ALSA driver 'snd_usb_audio'. Please report this issue to the ALSA 
developers.
 > Sep 5 11:58:46 tron-nb pulseaudio[4602]: We were woken up with 
POLLOUT set -- however a subsequent snd_pcm_avail() returned 0 or 
another value < min_avail.

I'm seeing something similar here, in a QEMU virtual machine started 
with -device intel-hda -device hda-duplex. The only difference with the 
logs reported by Tobias above is the alsa driver in second line:

Nov 30 03:53:00 debian pulseaudio[600]: ALSA woke us up to write new 
data to the device, but there was actually nothing to write.
Nov 30 03:53:00 debian pulseaudio[600]: Most likely this is a bug in the 
ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA 
developers.
Nov 30 03:53:00 debian pulseaudio[600]: We were woken up with POLLOUT 
set -- however a subsequent snd_pcm_avail() returned 0 or another value 
< min_avail.

-- 
Arnaud Rebillout / Offensive Security / Kali Linux Developer