Comment 2 for bug 84059

If is possible that you are being hit by a critical issue we found & resolved between yesterday and today.

A must for this error is you have multiple filesystems -- and, specifically, /usr/lib is on a different filesystem than /. If this is the case... then:

If you installed libx86-1 yesterday to this morning, this *may* be it (together with other updates that probably went along)

Check is there is a /usr/lib/libx86.so.1. If it is there, copy it over to /lib/libx86.so.1

You will probably be able to boot in single user mode, then log in as root on the console.

This *might* be it. For reference, this was bug # 83920.

If you are using grub, you can also stop usplash by ESCaping at the beginning of the grub process, then:

1. highlight the kernel you want to boot
2. hit the 'e' key (without quotes); this will edit the boot line
3. look for a line that has the keyword 'splash' on it
4. position yourself on this line, and hit the 'e' key again, to edit the line
5. remove the 'splash' keyword from the line
6. hit ENTER
7. hit the 'b' key to boot

This should allow you to look at the boot messages, and find (or, at least to have an idea) of what is going wrong.