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[Bug 370597] Re: Screen tearing at top of screen with VSync enabled on Compiz with fullscreen OpenGL programs

To: compiz@xxxxxxxxxxxxxxxxxxx
From: zatoichi0 <trzareq@xxxxxxxxx>
Date: Thu, 01 Oct 2009 11:02:22 -0000
Reply-to: Bug 370597 <370597@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

I also had tearing and finally got rid of it.

I have:
 MCP78S [GeForce 8200]
 AMD Phenom(tm) II X4 940
 Ubuntu Karmic 9.10 with latest updates from proposed
 2.6.31-6-rt x86_64 kernel
 gnome + compiz

The fix:
- enable Sync to VBlank in nvidia-settings (opengl section), compiz 
- restart compiz
- tearing stops in compiz (rotate cube) and video playback

The least tearing during H264 playback in mplayer is with '-vo gl' (not
gl2, or xv, or x11).

I'll will maybe checkout ffmpeg-mt if it makes a difference on other
video outputs - high cpu usage may also be the cause.

Would it makes sense to at least warn users about having sync to blank
turned off?

-- 
Screen tearing at top of screen with VSync enabled on Compiz with fullscreen OpenGL programs
https://bugs.launchpad.net/bugs/370597
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