Today I received the laptop from a friend, causing this post originally into
my hands to fix it, so I can examine the situation myself and more closely.

First finding was, amixer did not run anymore, it threw an undefined symbol
error:
ALSA lib conf.c:4004:(snd_config_hooks_call) Cannot open shared library
libasound_module_conf_pulse.so (/usr/lib/x86_64-linux-gnu/libsndfile.so.1:
undefined symbol: lame_encode_buffer_interleaved_int)

This was due to the package libmp3lame0 not being in version 3.100, it was
still 3.99.5 which is from jessie. Don't ask, I don't know. I had to dpkg --
install the version from daedalus, then the error disappeard. From then on I
had the choice of HDMI sink in KDE audio settings again.

Still there where errors from ALSA on the boot screen: "Failed to import hw:0
use case configuration" I could get rid of them by manipulating the init
script from alsa-utils: I needed to add in the restore_levels function the
argument "--no-ucm" to alsactl just before "restore".

>From that point ALSA was working and I could use amixer. Sound from audacity,
chosing sysdefault as an output was working.

I hit pipewire and reinstalled pulseaudio and plasma-pa. Next, I had to add to
/etc/pulse/default.pa.d/alsa.pa the line

    load-module module-alsa-sink

This restored "Built-in Audio" in KDE, and I have sound through the speakers
of the laptop.

This is probably not the way it should be. The module to auto switch the input
does work, but neither do I have sound through HDMI nor on the mini-jack. I
need to dig further, to have seamless sound as it was in chimaera.

The package "firmware-sof-signed" did not make a difference.

Regards, Adrian.

PS: This little report comes from my memory, I spent a few hours and did many
unnecessary steps. The installation is from 2012 under Debian and was upgraded
many times. So errors can come from ... anything. :-)


In der Nachricht vom Thursday, 8 August 2024 12:10:53 CEST schrieb Adrian
Zaugg:
> Hi
>
> After an upgrade to Daedalus, KDE Plasma's list of audio devices is empty
> (settings -> audio -> devices). The output can't be selected. Before the
> upgrade audio was working perfectly (using pulseaudio).
>
> Playing sound from VLC, Audacity and some others does work, but only through
> the internal speakers. No other output can be chosen. The volume can't be
> changed from the system tray's speaker symbol.
>
> To try to fix it I replaced pulseaudio with pipewire. This did not fix it
> permanently, means: Sometimes after a reboot the devices get listed in KDE
> and output choices and volume settings are working, but mostly the list is
> empty. I did not find a way to fix it permanently (unplugging the external
> monitor and all USB for example).
>
> Does anybody know a solution for that?
>
> Thank you very much.
>
> Regards, Adrian.