Fix for Cintiq line jitters

[heyjudo]

After much effort I finally solved it for my Cintiq 24hd. It seems to depend on getting a number of variables right and changing to certain legacy drivers.

http://www.yjstudios.com/blog/2014/05/08/how-to-fix-the-wacom-cintiq-from-shaky-jittery-wobbly-jagged-lines/