I've previously reported here a tearing in the top 1/6 to 1/8 of the picture on my 1080p panel with an Nvidia GeForce 6200 TC, the 7676 drivers, and MythTV 0.18.1 (see <URL:http://www.gossamer-threads.com/lists/mythtv/users/173841> for more info). I am happy to report that I've solved the issue.
I'd always had Sync to VBlank for OpenGL enabled in both nvidia-settings and in mythfrontend. (By the way, loading the glx module in xorg.conf or XF86Config is required for OpenGL sync to work; the *only* reliable way of seeing whether mythfrontend is actually using it is to check mythfrontend's log output, so start it from an xterm. If it says RTC, it's not using OpenGL.) However, that never helped with the tearing as far as I could see. After seeing a recent message by Jarod Wilson regarding his .nvidia-settings-rc, I tried *also* turning Sync to VBlank under 'X Server XVideo Settings' in nvidia-settings. (I'd always kept it off after, I think, having read someplace that I was supposed to.) This got rid of the tearing, but the picture now flickered as if it was skipping every other frame. I now tried switching the deinterlace settings in mythfrontend from 'Kernel' to 'Bob,' which of course offers twice the framerate. That did it; I now have a tear-free and pretty much rock-solid playback. I now give MythTV's output a grade of 99% instead of 95% as before; not 100% because there still *occasionally* seems to be some flickering, but it's so minor that it could very well be my hypochondriac imagination. I only wish I'd figured this out before ordering a used PCX 5300, which arrived today. That said, I only paid $45 including shipping and it's entirely possible that it will live up to my reason for buying it, namely to give me such smooth playback (or perhaps even better) without having to take the above extra steps. -- Yeechang Lee <[EMAIL PROTECTED]> | +1 650 776 7763 | San Francisco CA US _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
