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@mdpuma
Created September 23, 2017 10:27
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Intel GPU screen tearing fix
To check if OpenGL OMTC is enabled, go to about:support and under the "Graphics" section look for "GPU Accelerated Windows". If it reports "0/1 Basic (OMTC)" (possibly 0/2), OpenGL OMTC is disabled; if it reports "1/1 OpenGL (OMTC)" (possibly 1/2 or 2/2) it is enabled.
To enable OpenGL OMTC go to about:config and set:
layers.acceleration.force-enabled true
layers.offmainthreadcomposition.enabled true (default)
Restart Firefox for changes to take effect.
# /usr/share/X11/xorg.conf.d/90-intelgpu.conf
Section "Device"
Identifier "Device0"
Driver "intel"
BusID "PCI:0:2:0"
Option "AccelMethod" "sna"
Option "DRI" "true"
Option "TearFree" "true"
Option "DRI" "3"
EndSection
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