DRI is a framework that allows processes to safely and efficiently access graphic hardware.
Checking if DRI is enabled
grep DRI /varlog/Xorg.0.log
should print something like (II) intel(0): direct rendering: DRI2 enabled
Alternatively, if
glxinfo is installed, the following
grep can be used:
glxinfo | grep -B2 'direct rendering'
It should print
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Finally, the working of DRI can be confirmed with
glxinfo | egrep ' OpenGL (vendor|renderer|version)'
If this
egrep does not print something like
Software Rasterizer, then the
user who ran this command has working acceleration.