Public bug reported:
Dual-head display (Matrox G450, Xinerama, 1280x1024 on each screen).
The problem appeared immediately after migrating from drapper 6.06 to edgy 6.10
When moving a window fast enough on the secondary screen, the "trailing" effect
behind the window is not erased from the desktop and leaves random patterns
behind (on the desktop background). When moving the window very slowly, the
problem does not happen.
Displaying then closing any window on the garbled desktop repaints the desktop
background.
A much less frequent form of the problem is that once in a while, a graphical
object is painted garbled in an application window (for instance, the Google
logo in Firefox). In this case, the garbled spot is exactly the rectangle that
should have contained the graphical object.
** Affects: Ubuntu
Importance: Undecided
Status: Unconfirmed
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Randomly garbled display, secondary screen, dual-head
https://launchpad.net/bugs/68968
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