Comment # 8 on bug 1175908 from Harald Koenig

(In reply to Franck Bui from comment #7)
> (In reply to Harald Koenig from comment #0)
> > Aug 28 21:13:32 hl systemd-cryptsetup[433]: device-mapper: reload ioctl on  
> > failed: No such file or directory
> 
> That's probably a message emitted by libcryptsetup.
> 
> Can you show the content of /etc/crypttab ?

cr_sda5 /dev/sda5 none       none


> Can you try to attach your encrypted root device with cryptsetup(8) directly
> for the failing case (assuming that the emergency shell is started) ?

there is only systemd-cryptsetup in the initrd.
will reboot and reply later...