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["Viktor A. Danilov" <1288747@xxxxxxxxxxxxxxxxxx>]

I am using ubuntu 14.04 (amd64) at Clevo P151HM: i7-2670QM + GF116M [GeForce GT 560M].
 
My results:
* nvidia driver 331.38 + native compiz 0.9.11 = no bug
* nvidia driver 340.24 + native compiz + high performance mode + no flip = no bug
* nvidia driver 340.24 + native compiz + adaptive mode + flipping = bug presents
* nvidia driver 340.24 + patched compiz = no bug + tons of messages in log "Sync object is not ready -- were events handled properly?" (1-2 message every second), sometimes hangs


I download compiz source (from ubuntu), apply the patch,
then add following code in method PrivateGLScreen::prepareDrawing ():

  if (currentSync) {
        if (!currentSync->isReady()) {
            for (std::vector<XToGLSync*>::size_type i = xToGLSyncs.size()/2; i>0; i--) {
                updateXToGLSyncs();  /* try to check next sync */
                if (!currentSync) { break; }  /* method updateXToGLSync may disable syncs */
                if (currentSync->isReady()) { break; }
            }
        }
    }

just before check:

    if (currentSync) 
    {
        if (!currentSync->isReady())


As a result - no bug, no messages in log, no hangs, uptime 1day (during this time: live switching to dual-monitor mode and back, several cycles of suspend/resume, work with power supply and from battery.... it seems all is ok).


ps. Sorry for my bad english

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https://bugs.launchpad.net/bugs/1288747

Title:
  [334] Parts of the UI randomly flicker when moving the mouse

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