i915 and some more research

[Kim Schulz]

Hi again. 
I have recently been playing around with the 855resolution tool on my
laptop with i915 chipset. 
I noticed that this tool recognizes more resolutions reported by the
bios that xorg does. 

This is what 855resolution gives me:

Chipset: 915GM
VBIOS type: 2
VBIOS Version: 3412

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


and this is what xorg gives me:
www.cs.aau.dk/~kim/Xorg.0.log

As you can see, the mode names are the same. Also notice that the Xorg
log says this:
(WW) I810(0): Bad V_BIOS checksum
(II) I810(0): Primary V_BIOS segment is: 0xc000


I was wondering if it is actually a problem with the way xorg reads out
the bios and not the actual bios that has a problem. or am i totally
wrong here? 




-- 
   Kim Schulz   | Fundanemt Content Management system:         
 Geek by nature | http://www.fundanemt.com                    
   schulz.dk    | http://www.fundausers.org