I'd like to emphasize this: john doe, le lun. 03 janv. 2022 09:39:41 +0100, a ecrit: > - As far as I understand it, everything is working fine on Buster but > not on Bullseye, tarring the logs from a Buster installation and from > Bullseye might give us some clues on where this is failing.
Yes, please do this, that should be extremely informative. Any error message from the kernel will be visible in there. Possibly there are some error messages from alsa itself, which may not be there. Possibly you could use a smartphone to make a recording of the screen while you are booting the bullseye installer, so we can see which error messages you get there? Samuel