[mythtv-users] Can't adjust contrast, brightness etc in Mythtv .20

Robert Tsai mythtv at tsaiberspace.net
Wed Jan 17 00:16:38 UTC 2007

On Tue, Jan 16, 2007 at 06:07:04PM -0600, Randy Ferrill wrote:
> When I hit the F key and try to adjust birghtness , contrast , etc
> it changes to a -1 and won't change.
> PVR-250 and Nvidia Geforce 4MX card, FC5 and Mythtv .20.
> I searched the archive and found 1 posting but no answer or replies

I see the same thing. A few weeks ago I traced this problem down to a
failure in VideoOutputXv::SetPictureAttribute; one of the X or Xv
calls is failing.

The caller TV::DoChangePictureAttribute does not check for the
sentinel "-1" return value; hence you see "-1" in your OSD.

I don't know why the X/Xv calls are failing. Too many things have
happened since this was last working (distro/X.org upgrade, kernel
upgrade, NVidia driver upgrade, etc.).


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