[Nouveau] [Bug 37681] New: Tearing with composite extension

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=37681

           Summary: Tearing with composite extension
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: dack at ereomega.net
         QAContact: xorg-team at lists.x.org


See Ubuntu bug report for more details:
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/600178

There is extremely bad tearing with both nouveau and nvidia proprietary driver.
 Tearing is present even without using a compositing window manager.  The only
way I've been able to stop the tearing is to do something like:

Section "Extensions"
 Option "Composite" "Disable"
EndSection

I'm not sure which component is at fault (XGL, composite, nouveau?).

I have tested both nvidia driver and nouveau under unity, classic, and classic
(no effects).  Changing driver makes no difference.  Single or dual display
makes no difference.

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