[Nouveau] [Bug 31957] Video Noise on HDMI output

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31957

--- Comment #16 from James <buzzbuzz22 at hotmail.com> 2010-12-10 04:04:20 PST ---
It seems that the "noise" is not actually output by the graphics card. It is
created by the TV.
Changing the contrast and brightness using TV menus changes the pattern of the
noise.
My guess is this is caused by HDCP.
I.e. The nouveau driver somehow fails to set the HDCP as "not being needed", so
the TV adds a "degraded picture".
Maybe the nvidia drivers somehow manage to set the HDCP as "not being needed",
or the nvidia drivers correctly do HDCP.
Unfortunately, my TV does not tell me if HDCP has been negotiated or not, so I
cannot tell if the nvidia driver is doing HDCP or not.

Does anyone have any ideas?

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