Comment 24 for bug 433326

I'm on a Intel 82945G/GZ as well with Karmic beta and have the same problem.

Xrandr output:
Screen 0: minimum 320 x 200, current 800 x 600, maximum 4096 x 4096
VGA1 connected 800x600+0+0 (0x3c) normal (normal left inverted right x axis y axis) 0mm x 0mm
 Identifier: 0x3b
 Timestamp: 29423
 Subpixel: unknown
 Clones:
 CRTC: 0
 CRTCs: 0 1
 Transform: 1.000000 0.000000 0.000000
             0.000000 1.000000 0.000000
             0.000000 0.000000 1.000000
            filter:
  800x600 (0x3c) 40.0MHz +HSync +VSync *current
        h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz
        v: height 600 start 601 end 605 total 628 clock 60.3Hz
  640x480 (0x3d) 25.2MHz -HSync -VSync
        h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz
        v: height 480 start 490 end 492 total 525 clock 59.9Hz