Kernel options
from Documentation/kernel-parameters.txt
vga=xxx
set your framebuffer resolution to VESA mode xxx. (http://en.wikipedia.org/wiki/VESA_BIOS_Extensions#Linux_video_mode_numbers)
acpi=off OR noacpi
This parameter disables the whole ACPI system. This may prove very useful, for example, if your computer does not support ACPI or if you think the ACPI implementation might cause some problems (for instance random reboots or system lockups)
acpi=force