This line imports any entries to the end of the 'linux' line (Grub Legacy's "kernel" line). The entries are appended to the end of the normal mode only. This is similar to the "defoptions" line in menu.lst. If you want a black screen with scrolling boot messages, remove "quiet splash". If you want a grub splash screen with limited messages underneath the Ubuntu logo, use only "splash". < This [only "splash"]will not work in Karmic during boot as the xsplash does not display the messages , but the messages at shutdown will be displayed.
#GRUB_TERMINAL=console
Uncomment to disable graphical terminal (grub-pc only).
#GRUB_GFXMODE=640x480
Uncomment (remove '#' from beginning of the line) to change (increase) resolution of your boot loader. Use one of classic (4:3 rate):
GRUB_GFXMODE=640x480 (is used if isn't here a proper value)
GRUB_GFXMODE=800x600
GRUB_GFXMODE=1024x768
GRUB_GFXMODE=1600×1200
or make experiments with some others nonstandards like widescreen (16:10 ratio in my case), here is list of most of commonly use Display resolution:
GRUB_GFXMODE=640x400
GRUB_GFXMODE=800x500
GRUB_GFXMODE=1024x640
GRUB_GFXMODE=1280x800
GRUB_GFXMODE=1680x1050
If you don't know what modes are supported by your graphics card, go to the grub command line and run 'vbeinfo'. It will list all available modes. (You might need to run 'insmod vbe' first if the vbe module isn't loaded yet)
GRUB_GFXPAYLOAD_LINUX=640x480x8 [grub2 >= 1.98-1 (Lucid)]
Use this setting to set the framebuffer resolution (replaces the vga= kernel option). It uses the GFXMODE values with additional color depth. Use 'vbeinfo' from the grub command line to list what modes are available to you.
#GRUB_DISABLE_LINUX_UUID=true
Uncomment this line if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux.
GRUB_DISABLE_LINUX_RECOVERY=true
Add or uncomment this line to prevent "Recovery" mode kernel options from appearing in the menu.
GRUB_DISABLE_OS_PROBER=true
Enables/disables the os-prober check of other partitions for operating systems, including Windows, Linux, OSX and Hurd.