Hey,
bei now my Raspberry Pi 3 with OSMC and Kodi worked well on a trusted old Samsung LED 2013 TV. However I've updatet to the lastest version - April 2018 - and it seemed that there is a difference for my eyes and that my eyes get strainend a bit with the new software.
I've checked out that there was a kernel update from "4.9" to "4.14". Is there anyone who is more familiar with such a linux system?