Video Monitors

[Chris Jones]

> Try explaining what you've done, and what you're seeing (not to mention what
> monitor and graphics adapter you have).  

Indeed. I suspect it is just as likely to be an issue with the video 
card driver than the monitor itself.

If you have an ATI or NVIDIA card, are you using the OSS or closed 
source binary drivers ? If the former, try installing the later

https://help.ubuntu.com/community/BinaryDriverHowto

Chris