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Nor sure if this a Qtubuntu bug or a Mir bug


On a Nexus 10, do the following:

1. Download these files to the device:
http://bazaar.launchpad.net/~unity-team/+junk/qpa-mirserver/view/head:/qml-demo-client/qml-demo-client.qml
http://bazaar.launchpad.net/~unity-team/+junk/qpa-mirserver/view/head:/qml-demo-client/MovingRect.qml
and place in the same directory

2. Run mir demo server by calling mir_demo_server_shell

3. Run
qmlscene qml-demo-client.qml
You'll see a blue screen with a short red bar animating from left to right.

4. With 3 fingers, start interacting with the new surface. Be vigorous,
shake it around a good bit!

After some time, I notice the white flashes in the blue surface - it seems like 
some frames are all white. QML is not doing that anyway. With more time, the 
flashing becomes more evident. I've attached a video showing the flashing here:
http://people.canonical.com/~gerboland/mir-flicker.MOV

The source of the whiteness does puzzle me. Could it be the Qt app
misses the vsync, and an un-drawn buffer is used by the Mir compositor?

** Affects: mir
     Importance: High
         Status: Fix Released

** Affects: qtubuntu (Ubuntu)
     Importance: Undecided
         Status: Fix Released


** Tags: nexus10
-- 
White flickering of Qt clients on Nexus 10
https://bugs.launchpad.net/bugs/1273849
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