How to Enable Intel DRI3 in Xorg

The Direct Rendering Infrastructure (DRI) is a framework for allowing direct access to graphics hardware under the X Window System in a safe, efficient way. The main use of DRI is to provide hardware acceleration for the Mesa implementation of OpenGL. [Wikipedia]

You may be experiencing some graphical glitch effects on your DE, this might be the cause – DRI3 not loaded. How to check this:

$ cat /var/log/Xorg.0.log | grep DRI3

[    24.608] (II) intel(0): direct rendering: DRI2 DRI3 enabled

If the command returns nothing, this means DRI3 is not loaded.

How to Enable DRI3

Create this file (/etc/X11/xorg.conf.d/20-intel.conf) and add this to its content

Section "Device"
Identifier  "Intel Graphics"
Driver      "intel"
Option      "AccelMethod"  "sna"
Option      "TearFree"     "true"
Option      "DRI"          "3"
EndSection

Save and reboot, I hope this solves your problem.