unknown monitor problem

Posted by dev on Ask Ubuntu See other posts from Ask Ubuntu or by dev
Published on 2011-07-20T04:42:10Z Indexed on 2011/11/15 2:11 UTC
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I'm using HCL P30 laptop with 1280x800 60 Hz default resolution.But none of the ubuntu versions are capable of detecting my monitor.In 11.04 the resolution is 1024x768 61 Hz. When I run xrandr command in terminal,it returns

xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 1024 x 768, maximum 1024 x 768 default connected 1024x768+0+0 0mm x 0mm 1024x768 61.0* 800x600 61.0
640x480 60.0

So,how can I set it to 1280x800 60 Hz. plz reply soon. thnx in advance.

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