[mythtv-users] Tearing when NOT using XV Texture Sync

Rage321 rage321 at optonline.net
Tue May 29 04:41:21 UTC 2007


Hey, thank for this post.  I am suffering from tearing and can't figure out
where the problem came from.  I verified that your below suggested setting
was indeed in place, do you know of any other settings I can look at? 

-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Thomas Börkel
Sent: Sunday, May 13, 2007 6:37 PM
To: mythtv-users
Subject: [mythtv-users] Tearing when NOT using XV Texture Sync

HI!

I had a tearfree setup for playing SDTV (4:3 and 16:9 anamorph) using FX5200
and 800x600p, OpenGL Sync on in MythTV and nvidia-settings (NVidia driver
9755).

Then I upgraded to NVidia 7600GS and 1920x1080p (still viewing only SDTV).
Suddenly, I had a little tearing (upper 3% of the screen or so), but only
with 16:9 recordings.

Playing with nvidia-setings, I discoved, that enabling XV Sync to Texture
got rid of the tearing, but CPU usage went up by 10% (35% to 45%).

Then I enabled UseEvents option in xorg.conf and CPU usage is back to
normal.

Anyone else seeing this? Shouldn't OpenGL Sync be enough for tearfree
playing? Why does XV Sync to Texture help? Any known disadvantages of this?

Thanks!

Thomas

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