Fixed. Auto update copied all /boot files to main root partition instead of separate /boot partition used on this system. Hasn't had this problem before. So it can be fixed through the live CD, per these comments. And it still may be a bug in the Ubuntu update system.
-- Ubuntu update has crashed system https://bugs.launchpad.net/bugs/517613 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs