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Ubuntu 12.04 was functioning properly . Then after an update, some graphic elements stop working properly. I could not launch programs that has 3D elements. Work space switcher's window displays 2D window instead of a 3D like usual.

In Details menu, the Graphic row is blank.

I am using Intel GMA 4500MHD graphic card. I am guessing that the driver is not properly installed?

Anyone has the same issue? Please help!

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