Using 1280x1024 resolution with Matrox 2164W

[Clement <clement@ans.com.au>]

I can only bring up 800x600 screen on this card.  Using W2k on the same 
machine, I can display 1280x1024 @85Hz.  Do you know why XFree86 does 
not allow this to happen?  Below is the setting in XF86Config-4.  The 
machine itself is P4-2.4GHz w 1GB RAM.  Debain Sarge installed with the 
stock Kernel 2.6.6, apt-update/upgraded.

...
Section "Device"
       Identifier      "MGA 2164W Millennium II"
       Driver          "mga"
       BusID           "PCI:1:02:0"
EndSection
Section "Monitor"
       Identifier      "DiamondTron NF"
       HorizSync       30-130
       VertRefresh     50-85
       Option          "DPMS"
EndSection
Section "Screen"
       Identifier      "Default Screen"
       Device          "MGA 2164W Millennium II"
       Monitor         "DiamondTron NF"
       DefaultDepth    24
       SubSection "Display"
               Depth           1
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Depth           4
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Depth           8
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Depth           15
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Depth           16
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
       SubSection "Display"
               Depth           24
               Modes           "1280x1024" "800x600" "640x480"
       EndSubSection
EndSection
...

--
Regards,

Clement