video shimmer

[Claude Jones]

I changed KVMs today, a more modern version of my IOGear USB switch. The 
three Windows machines on it look perfect. My Fedora machine has 
shimmering or vibrating effects around the edges of windows, fonts, and 
icons. The screen is viewable but really annoying. I'm running an NVidia 
9500 card and it had been using the Nouveau driver - I tried switching 
to the NVidia driver from RPMFusion but there's no improvement. My 
resolution is 1920X1200 I'm using a Hanns-G monitor and it's being 
correctly detected. Can anyone offer a suggestion as to other 
trouble-shooting methods?
-- 
Claude Jones Brunswick, MD, USA