Quote:
Originally Posted by AbbeKoenig
The composition rate stays at 75.00-something Hz while the display rate fluctuates around 74.8-something Hz, but never hits 75 Hz. After a rather significant amount of time - mostly after about an hour into a movie because I don't notice this when playing 24-minute anime episodes - the display rate sharply drops to 40.00-something Hz, then slowly climbs back up to 66.3-something Hz. This all happens without any visible effects or any increase in the dropped frames/display glitches counters. Interestingly the clock deviation statistic does not seem to change along with the display rate change. I am not using ReClock.
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Lowering display refresh rate is a fairly common power management feature of laptop GPUs. Try to disable power management options in your GPU drivers. If you have an Optimus system (Intel + nVidia combined), you might have more luck looking into the Intel GPU driver options.