Comment 3 for bug 723482

I have a similar problem

After today's updates, I cannot boot my laptop anymore

I boot selecting Ubuntu safe-mode, and when laptop hangs up, press SysReq+i and this actions give shell.

I see:
init: ureadahead-other main process (903) terminated with status 4

# df -h
/dev/sda2 /
none /dev
none /dev/shm
none /var/run
none /var/lock
/dev/sda5 /home
/dev/sda7 /usr

UUID's from /etc/fstab and showed mith blkid command are agree.

Last three dmesg messages are:
EXT4-fs (sda7): mounted filesystem with ordered data mode. Opts: (null)
SysReq : Kill all tasks
udev[940]: starting version 167

Sorry for my bad English