Small GRUB Screen (menu/splash Image)

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After moving my CentOS 6 installation over to a new PC, the GRUB
start-up screen looks a bit strange. On the old machine, the menu area and splash image would cover the entire screen, but now they occupy only a small rectangle in its centre. I think what happens is that the max resolution of the graphics card/monitor combo is enabled even at this early stage, but GRUB assumes a 640×480 display.

Is there any way I can change the resolution so that the GRUB screen covers the entire display? I couldn’t find anything related to this in the documentation, or when searching the web, or actually, the topic is mentioned a few places, but they all refer to GRUB 2, and CentOS 6 of course has (a patched version of) 0.97.


– Toralf