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Accelerating Skylake 2D graphics

I recently upgraded my PC to a Skylake i5 (Core i5 6400), which has the new Intel graphics. However, 2D graphics was extremely slow on my 4k monitor. When I wanted to play a small webm, I could be sure Firefox would freeze; switching applications always took half a second. However, switching the acceleration method of the Intel driver from UXA (which was loaded according to Xorg.0.log) to SNA fixed that.

The following content for the file /etc/X11/xorg.conf.d/20-intel.conf fixed the issue:

Section "Device"
        Identifier "Intel Graphics"
        Driver "intel"
        Option "DRI" "3"
        Option "AccelMethod" "sna"
blog/accelerating_skylake_2d_graphics.txt · Last modified: 2016-01-10 17:27 by gnrp