Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I'm using Ubuntu 12.04, and when Im in the GRUB Menu there are black edges both at top/bottom and left/right. The same way it is in the Plymouth Splash, but additionally Plymouth seems to be stretched like from 4:3 to 16:9.

I use an external AMD GPU and the propritary drivers.

Any ideas?

share|improve this question
add comment

1 Answer

up vote 0 down vote accepted
  • At that early stage in the boot process, both GRUB as well as the boot splash (Plymouth) use the basic VESA VBE video drivers and not the full-featured proprietary video driver.
  • Many modern video cards support only a limited number of VBE resolutions since they aren't really used with a graphical desktop any more, only for boot,etc.
  • Hence, the lower resolution used by GRUB/Plymouth manifests as a "smaller" screen size on your monitor
  • As long as your Ubuntu Desktop works fine, this "problem" isn't really worth bothering about, to be honest.
  • If you strongly believe your video card should support a full-resolution VBE mode, you can try telling GRUB that by editing the /etc/default/grub file and then running sudo update-grub:

    # The resolution used on graphical terminal
    # note that you can use only modes which your graphic card supports via VBE
    # you can see them in real GRUB with the command `vbeinfo'
    #GRUB_GFXMODE=640x480   # <--- Change this to your monitor's maximum resolution
    
share|improve this answer
add comment

Your Answer

 
discard

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.