Error mounting /dev/dm-0 at /media/andreas/SEAGATE: Command-line `mount -t "ext4" -o "uhelper=udisks2,nodev,nosuid" "/dev/dm-0" "/media/andreas/SEAGATE"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/luks-22075c35-e46e-4e5c-b130-228026485a7e, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so (udisks-error-quark, 0)