How to set resolution higher than maximum shown?

Posted by Olivier Lalonde on Ask Ubuntu See other posts from Ask Ubuntu or by Olivier Lalonde
Published on 2010-12-27T01:35:41Z Indexed on 2010/12/29 11:02 UTC
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I just bought an external monitor for my laptop (Asus VH242H) but cannot set its resolution to anything higher than 1600x900. I tried both from System/Administration/Monitors and the ATI Catalyst Control Center. There was a CD that came with the monitor but it only contains a Windows installer.

According to the monitor's specifications:

23.6” 16:9 widescreen with 1920×1080 resolution enables borderless Full HD 1080p full-screen video display.

My graphic card is an ATI Mobility Radeon HD 4670 and the monitor is currently connected to my laptop with a VGA cable.

How can I set my external monitor to its maximum resolution?

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