[ubuntu] How do I adjust the resolution on an Intel gma x3100?

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http://ubuntuforums.org – Hello everyone. I'm with fresh install of 12.04, having gma x3100 on G31 motherboard. The problem is I own 19" monitor with native resolution of 1280x1024 but can't force screen resolution on more then 1024x768. Code: ~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm   1024x768      60.0*   800x600        60.3    56.2    848x480        60.0    640x480    &n (Hardware)