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Old 04-21-09, 07:40 PM   #1
thefirstm
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Default Tearing in vdpau with 185.19

In driver release 185.19, support for vsyncing the output of vdpau in blitting mode (like when composite is on.) However, I am still having a small problem with vsync in vdpau. I always get a fixed area on the screen, about 10 pixels tall, where it tears a very large amount. This area is about 2/3 of the way to the top of the screen. Videos played in a window entirely below this line do not exhibit the tearing. There isn't any error message in any log relating to this problem. My GPU is an 8600mGT driving a 1680x1050 laptop LCD display. Will this get fixed in a future release?
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Old 04-21-09, 10:57 PM   #2
Stephen Warren
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Default Re: Tearing in vdpau with 185.19

What about windows entirely above that area; are they OK too?

Please provide an nvidia-bug-report file. Thanks.
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Old 04-22-09, 05:27 AM   #3
thefirstm
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Default Re: Tearing in vdpau with 185.19

Because the tearing is so high up on the screen, it is hard to get a window fully above it. I tried this, and I did not notice any tearing, but since the window was very small I may have missed it. I have attached the bug report file.
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Old 04-22-09, 02:11 PM   #4
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Default Re: Tearing in vdpau with 185.19

Could you please try removing the following option from your xorg.conf:

Option "OnDemandVBlankInterrupts" "true"

Also, what kind of window manager are you using; are you actually running a compositing WM, or do you just have the X composite extension enabled?

Thanks.
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Old 04-22-09, 02:28 PM   #5
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Default Re: Tearing in vdpau with 185.19

The tearing still occurs with on demand vblank interrupts off. I use kwin as my window manager, with compositing turned off. I leave the composite extension on, however, because with it off I get redrawing artifacts on the KDE4 desktop.
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Old 04-25-09, 06:19 AM   #6
thefirstm
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Default Re: Tearing in vdpau with 185.19

This is still happening in 185.18.04
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Old 05-01-09, 03:50 PM   #7
apaige
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Default Re: Tearing in vdpau with 185.19

Confirmed with the 8300 IGP on the Asus M3N78-EM motherboard. It does *not* happen with my discrete 8600GT on the same board.
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Old 05-01-09, 03:59 PM   #8
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Default Re: Tearing in vdpau with 185.19

Quote:
Originally Posted by apaige View Post
Confirmed with the 8300 IGP on the Asus M3N78-EM motherboard. It does *not* happen with my discrete 8600GT on the same board.
No offence, but without bug reports this is quite useless information.
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Old 05-01-09, 05:55 PM   #9
apaige
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Default Re: Tearing in vdpau with 185.19

Nervermind: I downloaded and compiled the latest mplayer-svn tarball and it works fine again.
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Old 05-05-09, 07:58 AM   #10
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Default Re: Tearing in vdpau with 185.19

It's doing it again, with both the 8300 IGP and the discrete 8600GT (which I have now taken out of the PC). I don't know why. I've tried both the latest stable driver and the latest beta (185.18.08, which I am now running). I've also recompiled mplayer-svn several times. Maybe the problem is caused by some other update on my system (MESA? Xorg?), I have no idea.

To recap, the problem is tearing (always) at the top of the video (H.264 with VDPAU). Thing is, it sometimes happens with XviD videos as well (no VDPAU in use there). Also, OpenGL apps (glxgears, UT2004) are jerky when vsync is enabled.
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Old 05-14-09, 04:01 PM   #11
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Default Re: Tearing in vdpau with 185.19

I figured that the problem was some plugins for xfce4-panel (cpugraph, netload, genmon). As soon as I stopped them (kill -STOP), glxgears ran smooth with vsync enabled. Video playback seems tear-free as well, but I have to watch more movies to be sure.

I don't know what the core problem is - the panel plugins are very light, and conky, for one, doesn't trigger jerkiness in OpenGL apps or tearing in video playback. I'm going to investigate some more.
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Old 01-27-10, 03:41 AM   #12
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Unhappy Re: Tearing in vdpau with 185.19

I have this problem on my Zotac ION motherboard too. I have filed a bug with nvidia (with an nvidia-bug-report), but haven't heard anything back. I'm using Gnome (Ubuntu 9.10), but as soon as I enable compositing I get permanent tearing about 1/3 of the way from the top of the screen. I don't have any plugins or desklets to disable.
Did anyone ever get to the bottom of what's causing this?
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