Comment 18 for bug 723482

A T61 of mine was affected by this bug as well. Downgrading mountall from rev. 2.22 to 2.21 did not help, no luck with downgrading ureadahead from 0.100.0-10 to 0.100.0-9 either.

I then tried booting into Ubuntu 10.10 which was installed on the same machine (but on a different root partition) and that would also hang at the Ubuntu screen with the 5 dots underneath (and alternating).

Re-doing a grub-install from the Ubuntu 11.04 root partition did not help or make any difference.

So, then I booted into a rescue system, chrooted into the Ubuntu 10.10 root partition and re-did grub-install. That restored the system to a point where I could boot into Ubuntu 10.10 at least.

I hope this helps.