How does one "configure arts"? Same problem exists on openSUSE Leap 15.5. I
tried to use TCC > Sound & Multimedia > Sound System > Hardware to select the
Advanced Linux Sound Architecture, and the TCC window froze, leaving no response
in dmesg.

Hello Felix,

Yes, that's what I meant by "configure arts".

I've just tried on Mageia 9 on my real computer, and sound works correctly.

I've also installed a fresh opensuse 15.5 virtual machine, and sound works for it too.
I do not even need to choose Alsa explicitely, it works out of the box.

I have no idea why it does not work and freeze on your computer, but I think it's not the same problem as what was happened in Trinity 14.1.0, and was fixed in 14.1.1.

François