Further test have shown that grub indeed works, only the display is black. X was the first thing seen. After upgrading to kernel 3.3.6 per https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/993187/comments/91 now I can see the display as soon as kernel takes it. Grub splash screen and menu still black.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1031875 Title: precisely every second boot fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1031875/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs