Comment # 13 on bug 1175850 from Franck Bui

In reply to Fabian Vogt from comment #11)
> So if unmounting /var needs udev, there's a cycle...
> Apparently cryptsetup@ units don't set a dependency on udev, so that's why
> it fails that way.
> 
> On boot there's no cycle, because /var and /etc are mounted from the initrd
> using the initrd's udev.

Then both /var and /etc are supposed to be unmounted in initrd, no ?

What do /etc/{fstab,crypttab} look like on the affected systems ?