[arch-general] can't unlock a luks encrypted partition. (urgent).

[Hussam Al-Tayeb]

On Fri, 2009-10-09 at 19:48 +0200, Thomas Bächler wrote:
> Hussam Al-Tayeb schrieb:
> > Hi, I'm having a problem with disk encryption using luks. I have
> > my /home disk (on a separate disk 'sdb') encrypted using luks.
> > 
> > I have this in /etc/cryptsetup
> > home            /dev/sdb1               ASK
> > 
> > and this in /etc/fstab
> > /dev/mapper/home /home ext4 defaults,user_xattr 0 1
> > 
> > Suddenly today, it won't accept the passphrase on boot. I'm sure that
> > I'm entering it correctly. It took me 32 tries the first time and many
> > more the second reboot after kernel 2.6.31.3 update.
> 
> I don't really know what's happening right now. However, you should 
> comment out that crypttab line, mark /home as noauto in fstab, boot your 
> system and try unlocking there manually. That way, it will be much 
> easier to investigate the problem.
> 
Ok, I did that. and manually run 'cryptsetup luksOpen /dev/sdb1 home'
It literally took over 97 tries before it worked.
How do I investigate what's happening?  cryptsetup -v doesn't give extra
output?