View Single Post
Old 07-23-11, 10:08 PM   #1
bugfood
Registered User
 
Join Date: May 2003
Posts: 19
Default strange "checkerboard" tearing with xv

Hi,

I have a problem with the xv output on my system: when I play a video in full screen, or at least scaled to a higher resolution, I see strange tearing artifacts on an intermittent basis. I'm familiar with tearing causing a horizontal line dividing up the screen, but this tearing ends up making one or more horizontal bands, and these bands have irregular "checkerboard" edges.

I did some research and found that some people had disabled the X composite extension to solve tearing issues. This has no effect for me.

Rebooting or power cycling has no effect.

This has persisted across many kernel versions and nvidia driver versions (either installed with nvidia-installer or from Debian packages).

I see these problems using mplayer and using vlc.

Opengl, vdpau, and x11 output do not have this problem, though of course x11 output has no vsync and gets "normal" tearing.

Enabling or disabling "Sync to VBlank" in nvidia-settings does not seem to have an effect.

I managed to capture some examples by taking a video of the monitor. I will attach a few screnshots from that video.

Thanks for any help or ideas, and let me know if there is anything I should test.

Thanks,
Corey
Attached Thumbnails
Click image for larger version

Name:	00000178.jpg
Views:	125
Size:	71.5 KB
ID:	43087  Click image for larger version

Name:	00001614.jpg
Views:	124
Size:	57.3 KB
ID:	43088  Click image for larger version

Name:	00002017.jpg
Views:	116
Size:	70.4 KB
ID:	43089  
Attached Files
File Type: log xvinfo.log (3.4 KB, 61 views)
File Type: gz nvidia-bug-report.log.gz (84.0 KB, 68 views)
bugfood is offline   Reply With Quote