VGA port on Laptop produces blurry view on Display monitor

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http://askubuntu.com – I was using the monitor (Samsung SyncMaster SA100 via VGA) on desktop with good native resolution(1366x768) with sharper pixel rendering. As now I moved to my new laptop, and I attached the same monitor via VGA cable with laptop. The monitor works on the native screen resolution but its rendering is very dull and blurry as compared to the result on Desktop. I experienced this problem even on my older laptop with 11.10. I do not think if it is related to GPU. But how to figure it out? (HowTos)