Video tearing on second monitor using TwinView

swagger01 · 02-17-10, 12:06 AM

Hi,

Video tearing is occurring on my second monitor when I am using TwinView, which is very distracting.

Driver Version: 195.30
Distribution: Ubuntu 9.10

Please fix this NVIDIA as fast as possible since its very distracting for me.

drhirsch · 02-17-10, 02:42 AM

I doubt that this is technically possible. The GL can only sync to one monitor.

**AaronP** · 02-17-10, 03:00 AM

Try the VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE environment variable, documented in the README.

rtcm · 02-17-10, 08:14 AM

Quote:

Originally Posted by AaronP

Try the VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE environment variable, documented in the README.

I wonder, couldn't you implement this so that the video display surface would automatically sync to the monitor where it is contained? If it is contained on more than one monitor then ditch it and don't sync at all.

I think that would be easy enough to implement and it would Just Work without the user having to know about environment variables (which can only be set before the media player app starts...).

Regarding VDPAU, why doesn't it just use the XVideoSyncToDisplay driver setting in the first place? Ofcourse, VDPAU isn't XV thus that setting should probably be renamed but...

swagger01 · 02-17-10, 09:14 AM

Quote:

Originally Posted by AaronP

Try the VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE environment variable, documented in the README.

I am not a hacker, can you please explain what you mean by "try the environment variable"

I have also noticed that I am getting tearing when I playback video on my main monitor. I have set the XVideo Settings to "Sync to Vblank" and selected my main monitor to sync and also selected "Xv output" in Mplayer and still get tearing.

**Stephen Warren** · 02-17-10, 10:11 AM

If you use the overlay-based presentation queue, you will not have tearing on any display, and no need to configure anything. See the VDPAU section in the README for details on when the overlay- vs. blit-based presentation queue is used.

If you use the blit-based presentation queue, you may need to set an environment variable before you run your video player application, to tell VDPAU which display device to sync to:

export VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE=DFP-0

(replace "DFP-0" with the correct display name).

If you start your video player from a shell/command-line/terminal, simply execute that command first. If you start your video player from a script, you'll need that command in the script before starting your video player. If you start your video player using a GUI menu etc., things are more complicated; perhaps you can set that environment variable in your "x session" file.

rtcm · 02-17-10, 10:11 AM

Quote:

Originally Posted by swagger01

I am not a hacker, can you please explain what you mean by "try the environment variable"

Try

Code:

 VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE=CRT-1 mplayer media_file

changing CRT-1 to whatever is the connector where you want to sync.

Quote:

I have also noticed that I am getting tearing when I playback video on my main monitor. I have set the XVideo Settings to "Sync to Vblank" and selected my main monitor to sync and also selected "Xv output" in Mplayer and still get tearing.

You must set the connector where you want XV to sync on nvidia-settings and the make sure your mplayer is using the XV output like

Code:

 mplayer -vo xv media_file

mocharhw · 02-17-10, 05:42 PM

Does it matter if you put double quotes around the device in the env statement, like ="CRT-1" instead of =CRT-1? I've seen this both ways in various documents and forum posts.

**AaronP** · 02-17-10, 07:28 PM

No. The quotes just prevent the shell from evaluating things like * and ~ as special characters but for something simple like DFP-1, it doesn't matter.

swagger01 · 02-18-10, 01:10 PM

Let me reiterate that I am NOT a hacker but Ive tried my best to do all the solutions here and they STILL do not work !!

Every video player I have tried STILL the same thing, lots of tearing !!

I have set Xv to be my output in Smplayer, I have set my main monitor "DFP-0" to sync in "X Server Xvideo settings" I have also checked "Sync to Vblank" ... everything does NOT work !!

Please provide a meaningful solution, I have even reverted back to the stable 190.53 drivers and it still exhibits the same problem.

**AaronP** · 02-18-10, 02:55 PM

Are you running a composite manager such as Compiz?

swagger01 · 02-18-10, 10:03 PM

Yes I am running Compiz, there is a large majority of Linux users who use Compiz.

I never got any tearing when I ran a single monitor, this only happened when I activated TwinView.

02-17-10, 12:06 AM	#1
swagger01 Registered User Join Date: Sep 2008 Posts: 17	Video tearing on second monitor using TwinView Hi, Video tearing is occurring on my second monitor when I am using TwinView, which is very distracting. Driver Version: 195.30 Distribution: Ubuntu 9.10 Please fix this NVIDIA as fast as possible since its very distracting for me.

02-17-10, 02:42 AM	#2
drhirsch Registered User Join Date: Jul 2005 Posts: 61	Re: Video tearing on second monitor using TwinView I doubt that this is technically possible. The GL can only sync to one monitor.

02-17-10, 03:00 AM	#3
AaronP NVIDIA Corporation Join Date: Mar 2005 Posts: 2,487	Re: Video tearing on second monitor using TwinView Try the VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE environment variable, documented in the README.

02-17-10, 10:11 AM	#6
Stephen Warren Moderator Join Date: Aug 2005 Posts: 1,327	Re: Video tearing on second monitor using TwinView If you use the overlay-based presentation queue, you will not have tearing on any display, and no need to configure anything. See the VDPAU section in the README for details on when the overlay- vs. blit-based presentation queue is used. If you use the blit-based presentation queue, you may need to set an environment variable before you run your video player application, to tell VDPAU which display device to sync to: export VDPAU_NVIDIA_SYNC_DISPLAY_DEVICE=DFP-0 (replace "DFP-0" with the correct display name). If you start your video player from a shell/command-line/terminal, simply execute that command first. If you start your video player from a script, you'll need that command in the script before starting your video player. If you start your video player using a GUI menu etc., things are more complicated; perhaps you can set that environment variable in your "x session" file.

02-17-10, 05:42 PM	#8
mocharhw Registered User Join Date: May 2008 Posts: 113	Re: Video tearing on second monitor using TwinView Does it matter if you put double quotes around the device in the env statement, like ="CRT-1" instead of =CRT-1? I've seen this both ways in various documents and forum posts.

02-17-10, 07:28 PM	#9
AaronP NVIDIA Corporation Join Date: Mar 2005 Posts: 2,487	Re: Video tearing on second monitor using TwinView No. The quotes just prevent the shell from evaluating things like * and ~ as special characters but for something simple like DFP-1, it doesn't matter.

02-18-10, 01:10 PM	#10
swagger01 Registered User Join Date: Sep 2008 Posts: 17	Re: Video tearing on second monitor using TwinView Let me reiterate that I am NOT a hacker but Ive tried my best to do all the solutions here and they STILL do not work !! Every video player I have tried STILL the same thing, lots of tearing !! I have set Xv to be my output in Smplayer, I have set my main monitor "DFP-0" to sync in "X Server Xvideo settings" I have also checked "Sync to Vblank" ... everything does NOT work !! Please provide a meaningful solution, I have even reverted back to the stable 190.53 drivers and it still exhibits the same problem.

02-18-10, 02:55 PM	#11
AaronP NVIDIA Corporation Join Date: Mar 2005 Posts: 2,487	Re: Video tearing on second monitor using TwinView Are you running a composite manager such as Compiz?

02-18-10, 10:03 PM	#12
swagger01 Registered User Join Date: Sep 2008 Posts: 17	Re: Video tearing on second monitor using TwinView Yes I am running Compiz, there is a large majority of Linux users who use Compiz. I never got any tearing when I ran a single monitor, this only happened when I activated TwinView.