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!