Hans Verkuil wrote:
> Several people reported problems with the saturation of the PVR150/500
> cards. Please try the following command:
>
> ivtvctl -g reg=0x401,val=0xe0
>
> You have to be root to run this command and you may have to pass the
> -d /dev/videoX option if your card is not /dev/video0. You also have to
> run that command twice for the PVR500, once for each unit.
>
> Chroma was handled badly for the tuner and composite inputs, this should
> fix it. The bits that are set by this command used to be present in old
> ivtv releases but they were dropped for no apparent reason during a
> rewrite of the cx25840 module somewhere around 0.3.2.
>
> Please test and report whether this fixes the saturation issues.
>
Looks like it works for me. After using that command the saturation was
much better, while the saturation level was still set to 63.  I haven't
compared it closely to my PVR-250 tuners, but it is at least close enough
that it isn't immediately apparent.

Thanks for tracking this down. It is much appreciated!

Bob C





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