I had a fairly subtle glitching issue on my Samsung Ativ Book 8 running Openbox on Debian Jessie. Basically icons in Docky/Plank had a orange box outline and Tint2 icons also looked unsmooth.
In order to fix I did the following:
sudo nano 20-intel.conf
Then put the following in the file:
Section "Device" Identifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "TearFree" "true" EndSection