Sound problem | Fedora 41

Hello :grinning:,
I recently installed Fedora 41 on my Lenovo Yoga Slim 15 (model 2021). I did some fiddling to activate the subwoofer on the computer, as only 2 of the 3 speakers were working. However, I now have no sound … More precisely, I have to run pulseaudio --start and pulseaudio -k to temporally get sound. But the latter deactivates shortly afterwards.
What can I do?
Thanks a lot!

fdekerm