After upgrading to Fedora 36, the kernel can't decrypt my system at boot

Yesterday I have upgraded and it seems everything went fine. But after entering my decryption password the boot stucks at the following:

Switching to the latest F35 kernel instead fixes the problem:

PS: It is the KDE spin.

The problem still persist with the latest kernel. This time I also tried the latest F35 kernel with this command:

sudo dnf install kernel-5.18.5-100.fc35.x86_64 --releasever=35

But that does still the same. Only the kernel 5.17.11-200.fc35.x86_64 from before the upgrade is working. Something weird is going on. Is there no solution? I already considering a reinstall…

Hmm, this is rather weird. If the password was incorrect, it would have asked you to re-enter it up to 3 times, so if it continues with the boot process immediately after you enter the password for the first time, it is likely correct.

Unfortunately, error itself doesn’t give enough information to guess what’s wrong. You could boot from USB into a live session and play a bit from there. So basically try to decrypt and mount drive there and see if it works. If it doesn’t work, then you can search for specific error messages (you’ll be able to look at logs or errors that occur while decrypting/mounting a drive interactively).

If it does work, you can look at the journal messages and inspect the error that happens while trying to decrypt the device during normal boot process.