no CDs detected, but DVDs work fine

I can mount, read and write DVDs just fine. CDs worked too last time I tried, but there have been months of patches and updates since then. Today: if I insert a CD disk the drive makes a lot of clicking noises, but nothing is detected.

I seem to recall a post about this some time ago, and it mentioned a missing file or a wrong version file. I can’t remember exactly, and I’ve searched for the post with no luck.

Any tips would be appreciated.

Leap 42.1, KDE, all patches etc up to date.