Comment 8 for bug 577559

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Stenten (stenten) wrote : Re: X not available after kernel update (Ubuntu 10.04 LTS)

Try booting the -22 kernel with "noacpi":
1) Hold down Shift while booting to get to grub
2) With the -22 kernel highlighted, hit 'e'.
3) Add "noacpi" after "quiet splash".
4) Ctrl+x to boot.

You're not going to like it, but for this bug to have a good chance of being fixed, you need to reliably figure out what causes -22 to boot normally, to a tty, and freeze. Is there anything different about these situations? What programs are running? etc.