Macbook pro retina external monitor mouse skipping, lag problem

When I plug my macbook pro retina (Lion) into a 24" monitor through the DVI adaptor, the cursor jumps erratically every ~10 seconds when being moved. Feels like a lag and is worse with more programs running. Does not depend on mouse or mouse surface. Trackpad does it too. Any ideas? Thanks in advance.

Hi AO1 James,
If I understand correctly, the external monitor was blurry from the moment you plugged it into your MacBook Pro with Retina display. I would first check the resolution settings for the monitor with the "How do I select additional resolutions on my display?" section of the following article:
Apple computers: Troubleshooting issues with video on internal or external displays
If it remains blurry after selecting your monitors optimal resolution, I would use the steps under the "Reset the system" section of the article to help troubleshoot the issue.
Thank you for using Apple Support Communities.
All the best,
Sterling

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