https://bugs.freedesktop.org/show_bug.cgi?id=72087
--- Comment #7 from Andy Furniss adf.lists@gmail.com --- (In reply to comment #5)
Today I tested out by removing the HDMI Detective between the bedroom HTPC and the LG 32" LCD TV. My dithering xrandr option is still enabled and the XBMC 16-235 levels are still configured. I tested a few videos and still was able to notice the "grey to normal" transition for the first few seconds of the video playback start. So now I have a STRAIGHT HDMI connection to the TV and still experiencing the same issues. Thoughts?
I would try the direct connection without the dithering or 16-235 xbox setting to see if you still have the dark issue, and if not maybe the level issue will be gone also.
I would also try with another player like mplayer.
Do you have issues with this mpeg2 full range ramp?
I would try with current set up and normal settings/different player etc.
Of course normally (= player stretching 16-235 to full) the end 2 blocks will be the same, if xbmc is managing to use full range then they won't be.
What you see will also depend to some extent on the levels (brightness/contrast) set on the TV.