Re: pulseaudio reports error because probable bug in snd_usb_audio

Paul Menzel <[email protected]> Sun, 28 Mar 2021 09:07:57 +0200
Newsgroups gmane.linux.alsa.user
Message-ID <[email protected]>
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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