Adjust refresh rate

[fzinken]

@lukeeee

Hi I just did the update a few hours ago and am having real issues whenever a movie is about to start the display turns to black and a box from the monitor pops up stating "CANNOT DISPLAY THIS VIDEO MODE. CHANGE COMPUTER DISPLAY INPUT TO 1920x1080@60H

1. The new thread is not to report problems
2. For you problem check this Thread
   After Krypton, HDMI disconnects briefly on video start and stop