I verified this issue. First I change the /etc/grub.d/20_memtest86+ like below.
-menuentry "Memory test (memtest86+)" { +menuentry "Memory test (memtest86+)" --hotkey f9{ After update-grub and reboot, F9 could work. Next, I change the /etc/default/grub, I added 'GRUB_TIMEOUT_STYLE=hidden' After update-grub and reboot, F9 could work. Next, I change the /etc/default/grub like below. -GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT=10 After update-grub and reboot, F9 could work. So, I thought this issue should be fixed. ** Tags removed: verification-needed ** Tags added: verification-done -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1178618 Title: --hotkey option does not work when the menu is hidden To manage notifications about this bug go to: https://bugs.launchpad.net/grub/+bug/1178618/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs