Here's what I get: # 915resolution -l
Intel 800/900 Series VBIOS Hack : version 0.5.3
Chipset: 855GM
BIOS: TYPE 2
Mode Table Offset: $C0000 + $36f
Mode Table Entries: 21
Mode 30 : 640x480, 8 bits/pixel
Mode 32 : 800x600, 8 bits/pixel
Mode 34 : 1024x768, 8 bits/pixel
Mode 38 : 1280x1024, 8 bits/pixel
Mode 3a : 1600x1200, 8 bits/pixel
Mode 3c : 1920x1440, 8 bits/pixel
Mode 41 : 640x480, 16 bits/pixel
Mode 43 : 800x600, 16 bits/pixel
Mode 45 : 1024x768, 16 bits/pixel
Mode 49 : 1280x1024, 16 bits/pixel
Mode 4b : 1600x1200, 16 bits/pixel
Mode 4d : 1920x1440, 16 bits/pixel
Mode 50 : 640x480, 32 bits/pixel
Mode 52 : 800x600, 32 bits/pixel
Mode 54 : 1024x768, 32 bits/pixel
Mode 58 : 1280x1024, 32 bits/pixel
Mode 5a : 1600x1200, 32 bits/pixel
Mode 5c : 1920x1440, 32 bits/pixel
Mode 7c : 1024x600, 8 bits/pixel
Mode 7d : 1024x600, 16 bits/pixel
Mode 7e : 1024x600, 32 bits/pixel
Since I don't use mode 38 (1280x1024 resolution), I used 915resolution to overwrite mode 38 with the native resolution of my laptop screen: # 915resolution 38 1280 800
You just need to so something analagous to the above