Karmic Koala has switched to GRUB 2, and now the settings can be found in the file /etc/default/grub
Resolutions available to GRUB 2 can be displayed by typing vbeinfo in the GRUB 2 command line. The command line is accessed by typing "c" when the main GRUB 2 menu screen is displayed. (Hold the left shift key pressed before ubuntu loads to access it)
- Open /etc/default/grub with your text editor with root privilege.
Add the following new line using your preferred resolution-depth from the list that vbeinfo gave you. It should be like this if you have a 1280×800 screen:
GRUB_GFXMODE=1280×800
Save the file and exit. (If you can't save the file you haven't opened it as root, go back and execute gksudo gedit /etc/default/grubproviding your password.)
- Execute the command
sudo update-grub
- Restart your computer.
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