Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a problem with my grub installation. The screen is "moved" to the left a couple of pixels, which means that I cannot read the first 20 or so characters of the entries when I boot.

I'm running: Grub 1.99.21-ubuntu (the system is a Kubuntu 12.04). My video card is a Radeon HD 5400, running @ 1920x1080. My monitor, if it makes a difference is a Samsung SyncMaster P2470HN . When the boot process start itself (with the kubuntu log) the screen fits normally. Also, my other terminals (TTY1-6) suffers from the same problems.

share|improve this question
is grub coming up with a 80x25 screen like the startup screen of your bios? If not you might be running grub with text in graphics mode. – Anthon Apr 13 '13 at 15:56
You're not using a VGA cable are you? (Should be DVI or HDMI) – frostschutz Apr 13 '13 at 18:07
This can be either a bad, or less than compatible, VGA cable, or simply a need for tuning on the monitor side. If it has an autoconfiguration feature, try it while the GRUB menu is showing up. If the normal video mode of your OS looks OK, it is probably just lack of configuration for that mode. – njsg Apr 14 '13 at 2:20
I'm using a DVI cable but wit a VGA adapter at the computer. @Anthon It is coming as 1920x1080, but it is to the left. Meaning part of the screen is hidden, and to the right I have a black strip – Yohan Leafheart Apr 15 '13 at 15:06
up vote 1 down vote accepted

The problem is your monitor syncing the analog signal (you are using VGA at the computer side). I recommend editing (as root) /etc/default/grub and inserting (or uncommenting) the line:


After that you have to run sudo update-grub

That will reduce your grub screen to 80x25 characters, but like with the BIOS messages, your monitor is more likely to be able to sync.

If your computer can handle digital DVI (your monitor is almost certainly being able to handle that), I would highy recommend investing in a digital DVI cable. In my experience that solves syncing problems and seems to be giving a sharper picture.

share|improve this answer
Thanks Anthon. I will search for a compatible DVI-I cable (couldn't find before) – Yohan Leafheart Apr 16 '13 at 19:14

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.