vbetest를 실행하면 VESA 해상도를 볼 수 있다고 하더군요.
$ vbetest
VBE Version 3.0
Intel(r)915GM/910ML/915MS Graphics Chip Accelerated VGA BIOS
[352] 1680x1050 (256 color palette)
[353] 1680x1050 (5:6:5)
[354] 1680x1050 (8:8:8)
[355] 1280x800 (256 color palette)
[356] 1280x800 (5:6:5)
[357] 1280x800 (8:8:8)
[263] 1280x1024 (256 color palette)
