I can reproduce this problem on my Dell Inspiron N5010. If I shutdown my laptop and leave it in a cold room for a few hours, then it freezes at the "Ubuntu" boot screen (with dots indicating progress). By letting it stay on for a few minutes, forcing the power off, and then booting again, I am able to boot.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/817649 Title: Ubuntu 11.04 frequently freezes on boot with blank screen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/817649/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp