*** This bug is a duplicate of bug 1897965 ***
https://bugs.launchpad.net/bugs/1897965
** This bug has been marked a duplicate of bug 1897965
PulseAudio doesn't work when pipewire is installed (ie. KDE)
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https://bugs.launchpad.net/bugs/1922543
Title:
No sound, no audio profiles, until i do 'killall pulseaudio' (Asus
Zenbook 14 UM431D, ALC294 Analog)
Status in pulseaudio package in Ubuntu:
Incomplete
Bug description:
Hello.
Since i installed KUbuntu 20.10 i have an issue with the audio system.
Every time i boot the system, the system audio profiles and devices
are not recognized correctly, and normally there isn't an output audio
at all and no sound. However, if i do a "killall pulseaudio", suddenly
everything appears in the KDE audio profiles and the sound becomes
available.
My laptop (Asus Zenbook UM431DA, ALC294 Analog) have 4 speakers: 2 in
front (in both sides of the keyboard) and 2 in the back. It have also
a HDMI Audio output which is not recognized. But like i said, if i do
a "killall pulseaudio" everything appears, including the HDMI audio,
and all the expected audio profiles (Stereo, Stereo Duplex, 2.1,
4.0... all with variants with and without input). If i don't do that,
all i have is "Off" and "Input Analog".
With the KUbuntu 20.10 LiveUSB (Kernel 5.8.0-25) i didn't have the
issue (every boot brings all profiles) but since i installed in the
laptop (early installed Kernel was 5.8.0-31) i have the issue.
Actually i have kernel 5.8.0-44, the last official one from Ubuntu,
and everything is exactly the same.
I tried too using kernels via Ubuntu Mainline Kernel Installer, and i had
some differences with newer kernels. I was updating once in a while from there,
and at some point, i can be sure, the kernel could bring at boot a different
list of available profiles (sometimes only input, other only Stereo, or Stereo
+ 2.1, or Stereo + 2.1 + 4.0... each one with the input option) and sometimes
the HDMI audio appears and sometimes don't. But in all cases, if i do "killall
pulseaudio", all profiles come back.
However, Kernel 5.11.4 from mainline was the last one with that behaviour.
5.11.5 do the same as 5.8.0-44, every time at boot the only profiles are "Off"
and "Input Analog". Actually i have 5.12.0-051200rc5 with exact the same
results.
Using "pasuspender -- aplay -Dplughw:1 example.wav" to bypass
PulseAudio gives me sound in every case.
Also i have an issue (maybe related) with ALSA about i can't adjust
the volume from back speakers (between 1%~100% are always 100%,
between 100%~150% works) and front speakers have a low volume. But
it's directly related to ALSA because with pasuspender the behaviour
is the same. I reported that here
https://bugzilla.kernel.org/show_bug.cgi?id=212547.
I can provide alsa-info and dmesg from 5.8.0-44 (last official one
from Ubuntu), but also from 5.8.0-25 (from KUbuntu LiveUSB), and a
complete collection of alsa-info, dmesg and image of KDE audio
profiles from 5.11.0 (A kernel with the behaviour of different options
with every boot). Further, i can add alsa-info before and after
"killall pulseaudio", and data from 5.11.4 and 5.11.5, or
5.12.0-051200rc5, which is the last one available in mainline.
Thanks
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