I had the same intermittent issue on my Dell laptop. I am booting 12.10 x64 from a SSD drive. Starting with 12.10, the boot time has improved significantly and apparently that is part of the problem. I experimented with placing a service lightdm restart in rc.local but that resulted in a non-functioning touchpad. Michael's tip (#16) works perfectly for me.
Thanks, Michael! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1070150 Title: Intermittent low graphics mode with Intel HD graphics To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/1070150/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs