I have the same problem in 13.10 with the default grub setup: it ignores Shift and just starts the newest installed kernel. It also doesn't show the menu on restart after a crash, which would be a big problem if a newly-installed kernel (or https://wiki.ubuntu.com/Kernel/MainlineBuilds test kernel) turned out to be unbootable.
Workaround: comment out GRUB_HIDDEN_TIMEOUT=0 in /etc/default/grub to always display the boot menu. ** Changed in: grub2 (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1227365 Title: grub does not appear when holding down shift key To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1227365/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs