It seems that I don't have this problem, but if I'm missing out on some quality, I would really like to fix it.
I have a first generation HD Graphics (Core i3 530), and I have two settings for RGB in the Intel driver: Limited, Full. Even if I change it to full, setting reverts to limited before a reboot, and no visible change is made when changing settings.
I believe I have full output because I can clearly see the difference between levels 0-15 in the lagom black level test
I have 3 questions:
Is the problem mentioned in the thread related to crushing of BTB and WTW
(i.e.: 0-15 all look the same) or conversion from 0-255 to 16-235
Is displaying levels 0 - 15 as distinct shades in lagom test sufficient evidence of full RGB output through HDMI?
Wouldn't using a DVI-to-HDMI adapter work as a makeshift solution for those that don't need audio? (that is, intel:dvi - > tv, monitor:hdmi?