How to undo update-grub

Question

I just used the command "sudo update-grub" after having added nomodeset to the grub file. Now my laptop won't get past the empty violet linux booting screen. Any help on how to undo this?

I tried to use a terminal in safe mode, but I don't know how to edit the grub file with the terminal only (as gedit doesn't work on a terminal only).

If in grubmenu, you use e for edit and can edit boot stanza to remove or add nomodeset or other boot parameters. You can also go into grub terminal and manually boot but have to know details. See also: https://askubuntu.com/questions/654386/windows-10-upgrade-led-to-grub-rescue/655027#655027 — oldfred, Jul 01 '17 at 17:40

kasperd · Answer 1 · 2017-07-01T16:38:18.453

3

The easiest terminal editor to use is probably going to be nano so a command like this could work:

nano /etc/default/grub

You didn't specify exactly which of the grub configuration files you were editing. So it might be you have to type a different file name.

edited Jul 01 '17 at 16:38

answered Mar 05 '17 at 10:33

kasperd

1,729

1

Yes, it was this grub file I edited, so this answer would surely work, thanks ! – J. Schmidt Mar 05 '17 at 10:36

score 1 · Answer 2 · answered Mar 05 '17 at 10:33

1

You can use nano.

nano filename

Ctrl+O to write to file and Ctrl+X to exit.

answered Mar 05 '17 at 10:33

Shreyash S Sarnayak

615

score 1 · Accepted Answer · answered Mar 05 '17 at 10:34

1

Oops, sorry, apparently I didn't need to use a terminal. Pressing "e" while in grub selection will let me erase nomodeset :)

answered Mar 05 '17 at 10:34

J. Schmidt

139

No need to apologize for finding your own solution. – kasperd Mar 05 '17 at 10:37
So how do I close this question? or mark it as solved? does it do it automatically? – J. Schmidt Mar 05 '17 at 10:38
Click the checkmark next to the answer you like the most. – kasperd Mar 05 '17 at 10:39

How to undo update-grub

3 Answers3