http://bugzilla.opensuse.org/show_bug.cgi?id=1187259
http://bugzilla.opensuse.org/show_bug.cgi?id=1187259#c4
--- Comment #4 from Stefan Dirsch ---
I think you need to enable TearFree here.
# man xorg.conf
Option "TearFree" "boolean"
Disable or enable TearFree updates. This option forces X to per-
form all rendering to a backbuffer prior to updating the actual
display. It requires an extra memory allocation the same size as
a framebuffer, the occasional extra copy, and requires Damage
tracking. Thus enabling TearFree requires more memory and is
slower (reduced throughput) and introduces a small amount of
output latency, but it should not impact input latency. However,
the update to the screen is then performed synchronously with
the vertical refresh of the display so that the entire update is
completed before the display starts its refresh. That is only
one frame is ever visible, preventing an unsightly tear between
two visible and differing frames. Note that this replicates what
the compositing manager should be doing, however TearFree will
redirect the compositor updates (and those of fullscreen games)
directly on to the scanout thus incurring no additional overhead
in the composited case. Also note that not all compositing man-
agers prevent tearing, and if the outputs are rotated, there
will still be tearing without TearFree enabled.
Default: TearFree is disabled.
--> /etc/X11/xorg.conf.d/50-device.conf
Section "Device"
Identifier "Default Device"
Driver "intel"
Option "TearFree" "on"
EndSection
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