[mythtv-users] Persistent horizontal artifact ? Interlace artifact.

[William]

Oz wrote:
>
> Hi,
>
> I would appreciated any help with a problem that I have not been able 
> to solve.
>
> I have a moving horizontal line artifact when there is a fast moving 
> scene. It goes away when freezing the image.
> It is almost as if the computer cannot keep up with the motion. But 
> the CPU is far less then 100% It is in the teens
>
> OS: Ubuntu 9.04  Mythtv 0.22 Video card Nvidia 8600gts or 9600gt
>
> I have the same problem if the source image is in 720p or 1080i.
> either from ATSC (1080i) tuner card or HDPVR(1080i or 720p) as tuner.
>
> The Nvidia mode is setup to 1080p (the TV is 1080p)
>   It is either auto detected or because of the option in Xorg.conf :  
> Option         "metamodes" "DFP-1: 1920x1080_60 +0+0"
>
> VPDAU is enabled.
> The problem occurs in all deinterlaced options. The problem occurs in 
> 720p without deintrlacing.
>
> If I set the nvidia mode to 1080i will this solve the problem. (what 
> is the metamode option for 1080i, on dvi output?)
>
> -Thanks

Sounds like video tearing. Try adding the disable composite flag to your 
xorg.conf. Sorry I am not where I can pull up the exact command.

William