I do not know how to describe it. It is better to see once. Demonstration: https://drive.google.com/file/d/0B0nwzlfiB4aQekRSeGtoOWx5Snc/view?usp=sharing
$ rpm -qa | grep Xorg xorg-x11-server-Xorg-1.16.1-1.fc21.i686
Created attachment 109602 [details] kernel log
Created attachment 109603 [details] journalctl -u gdm --no-pager --since="2014-11-17 10:00" > Xorg.log
This was DRI3 explicit-vs-implicit fences fallout. The jury decided that continuing the DRI2 hack was preferrable...
(In reply to Chris Wilson from comment #4) > This was DRI3 explicit-vs-implicit fences fallout. The jury decided that > continuing the DRI2 hack was preferrable... Excuse me I don't understand in which version it would be fixed?
xf86-video-intel-2.99.917 has the implicit flushing for DRI3, and also disables DRI3 by default again.
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