Re: pulseaudio reports error because probable bug in snd_usb_audio

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Dear Nicolai,


Am 27.03.21 um 17:24 schrieb Nicolai Beuermann:

today my pc quits during a zoom session.

Can you please elaborate, what “pc quits” means? The Linux kernel crashed/paniced, the system rebooted, …?

Reading the error log I found following message (it's in german):

Mar 24 16:41:50 [pulseaudio] [alsa-sink-USB Audio] alsa-sink.c: ALSA
weckte uns auf, um neue Daten auf das Gerät zu schreiben, doch es gab
nichts zum Schreiben!
Mar 24 16:41:50 [pulseaudio] [alsa-sink-USB Audio] alsa-sink.c: Dies ist
höchstwahrscheinlich ein Fehler im ALSA-Treiber »snd_usb_audio«. Bitte
melden Sie diesen Fehler den ALSA-Entwicklern.
Mar 24 16:41:50 [pulseaudio] [alsa-sink-USB Audio] alsa-sink.c: Wir
wurden durch das POLLOUT-Set geweckt, allerdings lieferte ein
anschließender snd_pcm_avail() den Wert 0 oder einen anderen Wert <
min_avail.

(No idea, why Thunderbird wraps the lines. It makes the logs hard to read.)

I do not think, this should crash the system in any way though.

My environment:
Gentoo Linux - 5.4.97-gentoo

As you use Gentoo, I suggest using the latest Linux release – currently 5.11, as – whatever the issue is – might already be fixed there.

Headset used:
Sennheiser PC8
[    2.021331] usb 1-5.3: Product: Sennheiser USB headset
[    2.024387] usb 1-5.3: Manufacturer: Sennheiser Communications
[    2.047664] input: Sennheiser Communications  Sennheiser USB headset as
/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.3/1-5.3:1.3/0003:1395:0025.0002/input/input7
[    2.106198] hid-generic 0003:1395:0025.0002: input,hidraw1: USB HID
v1.00 Device [Sennheiser Communications  Sennheiser USB headset] on
usb-0000:00:14.0-5.3/input3

Please let me know if you need more information.


Kind regard,

Paul


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