I upgraded a htpc from 10.04 to 11.04 yesterday. All was quick and painless. One prompt for updating a conf file. Then goes to reboot. Errrrror no display. The connected tv does not have the resolution for the grub screen so can not pick alt kernel to boot.  Connecting into ssh I saw that when loading nvidia module says no display and fails to start X11. Try to fix for a little then pass on that project for the night. While at work ran updates on my notebook. I saw there was a kernel update but didn’t think much of it. These updates produce the same results at htpc at home 🙁 I was able to boot into 2.6.38-10 on the notebook from grub. Worst week in my use of OSS. Now have two systems to repair.