ctrl-x does not work in grub-efi

Bug #722950 reported by Phillip Susi on 2011-02-22
This bug affects 8 people
Affects Status Importance Assigned to Milestone
grub2 (Ubuntu)

Bug Description

Binary package hint: grub2

If I boot the Natty daily livecd in EFI mode and press e at the grub prompt to edit the command, it says to press ctrl-x to boot the entry. Pressing ctrl-x results in it just inserting the letter 'x' instead of booting.

Janosch Maier (phylu) wrote :

Similar problem on Ubuntu 10.04 Server version.

Igor Mitrenko (igor-mitrenko) wrote :

Ctrl+x doesn't work in grub2 version, shipped with Ubuntu 11.04. As well as other ctrl+<...> hotkey doesn't work.

It won't insert "x" and other symbols like ctrl is not pressed, it just does nothing. Whereas alternative hot keys like F10 and others work well.

Phillip Susi (psusi) on 2011-06-14
Changed in grub2 (Ubuntu):
importance: Undecided → Medium
status: New → Triaged
Janne Snabb (snabb) wrote :

I am affected by this issue on Ubuntu 15.04 x86_64. I have AMI BIOS/UEFI. Ctrl-X does not work (but F10 works). In my case 'x' is inserted as if I did not press Ctrl key.

I found a discussion and a potential patch at: https://lists.gnu.org/archive/html/grub-devel/2013-08/msg00003.html

Possibly related question at StackExchange: https://unix.stackexchange.com/questions/103989/pressing-ctrl-x-or-f10-does-not-boot-linux

Dan Mick (dmick-m) wrote :

This is fixed in the upstream by commit 9e5f70174ec960a0077f20bb74cb9f4da9b57e7b (and a warning removed by 5fcde03bf1e8cf74c186bcef6d705734f2d002c5). Grub also just recently tagged grub-2.02-beta3 with many more fixes. I think this one is major enough that, if the risk of a full transition to beta3 is considered high until more testing is done, then the above two commits should be pulled in as a patch.

This is a complete disabler for those trying to boot EFI over serial-redirected console, as it's likely F10 doesn't work, and neither does ^X.

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