[Bug 46800] [SNB] Full/Limited Color range not working automatically for 1000/1001 CEA modes

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Apr 9 10:47:36 PDT 2013


https://bugs.freedesktop.org/show_bug.cgi?id=46800

--- Comment #13 from Marco Vuano <vuanomarco at gmail.com> ---
Using limited range always create banding on non-video material (only 220
levels are used), furthermore on televisions and monitors set to accept a full
range it lowers contrast. Many televisions now have a setting to accept full
range RGB values over HDMI, and it is much easier to find for non-expert than
using xrandr. 
In fact, on Windows we have the inverse problem, that is only limited range RGB
values are output when using modes related to television with Intel GPUs, and I
think this is a worse problem than having full range RGB values output as
default (I solved the latter problem in much less time just by setting
correctly my TV monitor). You can see the discussion on these two threads:
http://communities.intel.com/message/156323
Therefore, while I think that the automatic setting makes sense, I still think
that the default setting should be full range, with the option on xrandr to set
limited or automatic range.

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