Since this occurred on both ATI and Nvidia chips, I am going to assign it to the more general xorg package. The maintainers will move it if they feel necessary.
** Package changed: update-manager (Ubuntu) => xorg-server (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784449 Title: Missing graphic card driver makes boot fail after dist upgrade -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs