Intel G45: resolution on VGA port limited to 640x480

[Frederik Himpe]

I have a Dell Latitude E6400 with Intel Mobile 4 Series Chipset 
Integrated Graphics Controller [DISPLAY_VGA] (vendor:8086 device:2a42 
subv:1028 subd:0233) and I'm using Mandriva 2009.0 x86_64 and xserver 
1.4.2.

With both the Intel xorg driver version 1.4.2 and 1.5.1, the resolution 
on the VGA port, is limited to 640x480:
$ xrandr
Screen 0: minimum 320 x 200, current 1440 x 900, maximum 1440 x 1440
VGA connected (normal left inverted right x axis y axis)
   640x480        60.0  
LVDS connected 1440x900+0+0 (normal left inverted right x axis y axis) 
303mm x 190mm
   1440x900       60.0*+   40.0  
   1024x768       60.0  
   800x600        60.3  
   640x480        59.9  
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
TV disconnected (normal left inverted right x axis y axis)

My xorg.conf contains
Virtual 2720 1024
lines and according to the Xorg.0.log, it really detects that the monitor 
supports 1280x1024 with DCC.

Complete xorg.conf and Xorg.0.log can be found in this Mandriva bug 
report: https://qa.mandriva.com/show_bug.cgi?id=45586


Unrelated to that: EXA is unusably slow for compositing on this system: 
my GNOME desktop feels noticeably slower and when running dmesg in a 
transparent gnome-terminal, you see that the image is only refreshed a 
few times per second. Also in 1.5.1, these messages appear in dmesg:
[drm:i915_getparam] *ERROR* Unknown parameter 5
mtrr: type mismatch for e0000000,10000000 old: write-back new: write-
combining
set status page addr 0x023c0000

-- 
Frederik Himpe