I am running on Dell Latitude E6500, with a VGA adapter with PCI ID 10de:06eb.
I have several, relatively small, corruption of bitmaps. I suspect that the pixmaps sent to the X server for storage
and display get corrupted when stored in the Xserver for too long. This is mostly visible in the flags indicator for
the current keyboard.
The problem happens whether I'm running on dual monitor or not.
After I create the xorg.conf file specifying the nouveau driver, the problem got slightly better, but did not go away.
I have been unable to test with the "nv" and "vesa" drivers, as nouveau gets loaded fairly early by the initrd, and
the other drivers refuse to load.
The proprietary nvidia drivers were never installed since the last OS clean installation.