The error on tty1:
[ 80.143123 ] device-mapper: table: 254:5: linear: dm-linear: Device lookup failed
[ 81.289517 ] device-mapper: table: 254:5: linear: dm-linear: Device lookup failed
etc...
Seems this error is due to the new kernel 2.6.22 after the Ubuntu upgrade
apt-get remove evms
Thanks to: http://ubuntuforums.org/showthread.php?t=587450
If
the errors just keep going press ctl+alt+delete and it seems to
continue booting to a gui. Otherwise just reboot into the old kernel
2.6.20
also found that mdadm was installed when I
wasn’t useing any raid, this may have prompted the evms issue during
upgrade – suggest doing an `apt-get remove mdadm` ONLY if you are not
using raid.