Comment 20 for bug 1049630
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#20 |
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0e1f616
(Get the code!)
From Launchpad:
Setting VBLANK_MODE=0 seems to delay the appearance of corruption. Example:
Starting a regular, non-accelerated gnome-session, and then running:
VBLANK_MODE=0 glxgears
..it takes a while (and some dragging of glxgears around the screen) before the corruption appears, whereas normally it would appear rather quickly.
As noted before, the corruption isn't limited to the accelerated areas, and can happen when running a non-composited desktop under normal usage. Running openGL programs or compositing makes it appear very readily, though.
I believe it was mentioned in the Launchpad bug, but not here -- Once corruption begins, changes in an X-Session can affect other virtual consoles (e.g., once corruption begins, start a slow-loading program, switch to a virtual console, and as the program maps its graphical components, the console graphics get corrupted).
Hope this helps..