[mythtv-users] mythtv darkens dark scenes on video playback and on desktop SOLVED

[Dave Richardson]

> On Thu, Sep 10, 2009 at 1:16 PM, Dave Richardson <mythtv at derdev.com> wrote:
>> I swear this to be true (!)...
>> The Mythbuntu desktop and all video playback seems to darken on video
playback that involves darker scenes.  It then brightens to what I
regard
>> as normal brightness when the scene has more color or brightness. For
instance on the plain mythbuntu desktop (Gnome?) I use a dark
theme.
>> If there's nothing else being displayed, the screen is darkened by,
say,
>> 40%.  If I right click to open the mouse menu, or open a menu
>> navigation,
>> the whole screen brightens up again.
>> It's kind of like that feature (that I hate) on car stereos that raises
and lowers the audio level based upon the speed of the car.
>> I've disabled all power saving options on my LCD HD TV.  Is there any
chance there's a setting somewhere in mythbuntu, myth, or the nvidia
driver that I don't know about that is causing this behavior?
>> kit: mythbuntu 9.04, myth 0.21, ionitx a-u w/geforce 9400, nvidia
driver
>> 180 series (from their website a week ago), HDMI output.
>> (Cable tv playback directly into the TV does not have this "feature".
Thanks in advance!
>
>
> Your tv has "contrast" set to "dynamic".  It likely doesn't do it for
the onboard cable tuner, but probably has it turned on for hdmi.'
>
> It's not a power saving thing, it's so that they can lie and say the TV
has 328493248932:1 contrast ratio.
>
> I actually keep it on for my TV as I watch with the lights off (it's
only on the tv in the bedroom) but I can see how it'd be annoying in a
lit room.
>

Thanks Bill, SOLVED!  Sharp's LCD menu had "Active Contract" buried under
an "Advanced" options menu.  Disabled it and things are 'normal'.  Sorry
to have bothered the list with this.