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Old 04-24-06, 06:41 PM   #13
d13f00l
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Default Re: How can I tell what VRefresh im running?

As a side note, most GL apps seem to be fine.
Ut2004 runs fine on both the DFP and TV
mplayer -vo gl also works without tearing
glxgears is fine, and locks at 60fps as it should

XVideo seems to be tearing on one monitor or the other, mplayer -vo xv, xine, etc
As does zsnes, which locks at 60fps, but it's tearing and that uses OpenGL so I don't get it...that was definitely not tearing before the upgrade...unless it's using SDL which also tears, mplayer -vo SDL tears
Maybe X11 syncing got broken somehow?
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Old 04-26-06, 03:01 PM   #14
d13f00l
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Default Re: How can I tell what VRefresh im running?

Any other ideas?
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Old 04-26-06, 03:56 PM   #15
AaronP
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Default Re: How can I tell what VRefresh im running?

Hi d13f00l, sorry for the late reply. Since the individual displays in TwinView can run at different refresh rates, the driver assigns a unique number as the "refresh rate" as reported to the server so that the modes are distinguishable. Otherwise, you wouldn't be able to switch between modes like "1280x1024,NULL" and "NULL,1280x1024" with xrandr.

As for the refresh rates, your modes have these rates:
  • 1280x1024 --> 60.02 Hz
  • 1024x768 --> 60.00 Hz
  • 800x600 --> 60.32 Hz
  • 640x480 --> 59.95 Hz
When you plug in your TV and use your DFP,TV metamode, you're using your 640x480 mode for both displays.

There is no way to synchronize to two displays at the same time because they could be running at different rates or out of phase. It's surprising that you didn't see tearing with older drivers.

zsnes has some modes that use OpenGL and some that don't. Are you sure you're using one of the OpenGL modes?
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Old 04-26-06, 04:59 PM   #16
d13f00l
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Default Re: How can I tell what VRefresh im running?

Quote:
Originally Posted by AaronP
There is no way to synchronize to two displays at the same time because they could be running at different rates or out of phase. It's surprising that you didn't see tearing with older drivers.

zsnes has some modes that use OpenGL and some that don't. Are you sure you're using one of the OpenGL modes?
No problem. Allright, thanks. zsnes is using 640x480 ODS mode, I think it means it uses OpenGL, and scales to full screen.

Also, I think because I was running the wrong version of nvidia-settings, I couldn't switch what display to vsync on. If I switched it and closed nvidia-settings, it'd go back to having the other selected. The current version doesnt do that. That was my main issue, thanks!!

But still, odd. Why are OpenGL games able to sync on both screens, or is that my imagination? Is it possible that the syncing code for that can delay refreshing on each head separately, or something? mplayer -vo gl doesn't tear on either screen, so I guess I'll just use that for playing video. XV tears quite noticibly on one screen or the other depending on what display it's synced to.

If you want to reproduce it, it's as simple as taking a video, and two screens in twinview clone mode
mplayer -vo xv whatever.avi
One will tear
mplayer -vo gl whatever.avi
Neither will tear
Thanks!

Last edited by d13f00l; 04-26-06 at 05:14 PM.
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