Mike Dilger wrote:
> I'm having trouble with video tearing (vertical sync? or maybe not, 
> unsure) after an upgrade.
> 
> The system used to work flawlessly, using gentoo-sources-2.6.16-r4 and 
> ivtv-0.6.4 and mythtv 0.20_p12325.
> I'm running a hauppauge PVR-150.
> 
> I just upgraded to gentoo-sources-2.6.19-r4 / ivtv-0.9.1 / mythtv 
> 0.20_p12376
> 
> If I setup ivtvctl/v4l2-cfg settings manually and run "mplayer 
> /dev/video0" it works great, I see clean stable video, and I can change 
> the channels by command line.
> 
> But as soon as I run mythbackend, the video in mythfrontend tears pretty 
> badly... some black-and-white comes in clear, but most of it gets trashed.
> If I then stop mythbackend, and revert back to "mplayer /dev/video0" it 
> still tears... and the problem persists until I reboot.
> 
> Technically I suppose this is a mythtv configuration or integration 
> problem, not a problem in ivtv.   But clearly mythtv is setting 
> something in the ivtv module that is causing this to happen.   I hoped 
> you guys might recognize it.

Don't think so, it is probably the issue with VBI and scaling, see [1] 
for more info.

Greets
Sander

[1] 
http://ivtvdriver.org/index.php/Troubleshooting#Closed_caption_.28vbi.29_with_non_default_reolutions


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