Pulseaudio malfunctioning after the kernel update (5.3.18-150300.59.6)

English Multimedia
#1

After updating to the latest kernel version (5.3.18-150300.59.68-default) the DragonFly USB DAC stopped working after starting Kodi (19.4-pm153.2.2). Pulseaudio is run in system mode (systemd service). After starting the server (small multimedia home server) the sound works correctly. But when I start Kodi by

systemctl --user start kodi_user.service

[FONT=monospace][Unit] 
Description = Kodi Media Center 

[Service] 
#User = firefly 
Restart = always 
#ExecStartPre = /usr/bin/pulseaudio --k 
ExecStart = /usr/bin/kodi 
Environment="DISPLAY=:0" 

[Install] 
WantedBy = multi-user.target
[/FONT]

sound stop working and the PA log (journalctl) is full of repeating errors:


...
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:57 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600) 
kvě 26 20:43:58 serenity pulseaudio[912]: W: [alsa-sink-USB Audio] alsa-sink.c: Resume failed, couldn't restore original fragment settings. (Old: 576000/288000
, New 529200/264600)
…

When I boot the previews kernel version 5.3.18-150300.59.63 the PA works correctly after start of Kodi and with the USB DAC. I had no similar issues with sound until the last update of kernel.

Do you have an idea what might be wrong?

#2

I’ve managed to solve the problem by commenting out the parameters

;default-sample-rate = 48000
;alternate-sample-rate = 44100

in the configuration

 /etc/pulse/daemon.conf

.

The source of the solution was: https://forums.gentoo.org/viewtopic-t-1149986.html

I don’t know how is the sample-rate related to the kernel update, but it helped.

#3

Using PulseAudio, not Pipewire.

I had similar problems with external DAC:
Audacious, VLC works. Vivaldi works after update.
Firefox cannot play sound, so youtube videos cannot be played with DAC output, but works with another devices.

I solved it with these PulseAudio settings in /etc/pulse/daemon.conf:

default-sample-format = s24le
default-sample-rate = 44100

Also works with

default-sample-format = s24le
default-sample-rate = 48000

IMHO 44100 is preferable for online videos.

Parameter “alternate-sample-rate” may cause troubles.