[xorg-bugzilla-noise] [Bug 1262] New: Screen corruption when using Xorg 6.7.99.903, xcompmgr -cf, nvidia twinview on amd64 architecture

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https://freedesktop.org/bugzilla/show_bug.cgi?id=1262        
   
           Summary: Screen corruption when using Xorg 6.7.99.903, xcompmgr -
                    cf, nvidia twinview on amd64 architecture
           Product: xorg
           Version: 6.8.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: Server/general
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: linux at cryos.net


Using xorg-x11-6.7.99.903 on amd64, with nvidia 6106 drivers and KDE 3.3/fluxbox
0.9.9. Xorg seems stable 99% of the time connected to two 17" TFTs at 1280x1024
24bpp - sometimes get some corruption of second screen when awakening from TFT
power off (cured by Ctrl+Alt+F1 and then Ctrl+Alt+F7) - don't know if this has
any relation to the problem.

I can use KDE normally without any big problems. If I execute xcompmgr -cf (or
other flags) I get screen corruption such as this,
http://www.cryos.net/corrupt-display.png

I can get rid of this by dragging a window over the corrupt areas. The
background is then redrawn as in this shot (can get rid of all of it),
http://www.cryos.net/less-corrupt-display.png

I can then change transparency of windows etc, but if I change virtual desktops
then upon return to the one with transparent windows on it they are not redrawn.
I have to kill xcompmgr for them to be redrawn.
http://www.cryos.net/windows-not-redrawn.png

I have reproduced the above behaviour in both KDE 3.3 and fluxbox 0.9.9 - I have
taken screenshots of fluxbox as it is the simplest of the two. It appears events
are not being triggered as they should be. Possibly related - screen blanks as
if no activity even when there is mouse/keyboard activity too.        
   
   
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