Comment 39 for bug 880476

@pcilela -- there is something odd about how your grub update has gone as you have moved from an root=UUID=xxx form to a root=/dev/sda7 form. So it may be something outside the kernel which is failing here.

Can you try editing the boot line when in grub, to use the root=UUID=xxx form (the exact uuid should be copied from the -12 entry which works) and see if that boots ok. Please report how that work here.

Also we should be slightly suspicious of the initrd for -13 given your errors. So could you also run:

    update-initramfs -u -k 3.0.0-13-generic

and report the complete output here.