Comment 49 for bug 1447282

I didn't read the whole thing now, me it affected affected after I activated the swap (not mapper) entry in fstab. I've done because I thought, what the f***, I ran without swap all the time?

Then this entry appeared before lightdm and swapon --summary showed me /dev/sdXX. Disabling the classic swap line gave me a /dev/dm-0 device mapper reference... Jupiee problem solved.
I think cryptswap doesn't need a classic entry in fstab, but if there is one systemd gets confused, tries to access the cryptswap, asks for password, gets the wrong and activates classic swap... ouch

Best Regards