[Bug 757670] New: glvideomixer frame dropouts on nvidia

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=757670

            Bug ID: 757670
           Summary: glvideomixer frame dropouts on nvidia
    Classification: Platform
           Product: GStreamer
           Version: 1.6.1
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: topolsky at maindata.sk
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

With simple pipeline:

gst-launch-1.0 videotestsrc pattern=ball ! glvideomixer ! ximagesink

The output is dropping frame (the ball is jumping not moving smoothly) when
moving some (X) window.

Tested on version of nvidia-340 and nvidia-346. 

The same pipeline with compositor works flawlessly.

gst-launch-1.0 videotestsrc pattern=ball ! compositor ! ximagesink

Tested on Ubuntu 14.04 64bit
Intel(R) Core(TM) i7-4770S CPU @ 3.10GHz
NVIDIA Corporation GK106 [GeForce GTX 660] (rev a1)
8 GB RAM
gstreamer tagged commits of 1.6.1

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