From: Michael Logan (mlogan++at++mail.arc.nasa.gov)
Date: 10/22/2001 15:20:45
Hi everyone,
So what is the final pfAnswer to this?
I have a Dell Precision530/Quadro2-Pro/Linux-RH7.1 and it tears all over
the place at any resolution (1024x768,1280x1024,1600x1200).
My Performer is 2.4.2-2 with
nvidia drivers GLX-1.0-1190 & nvidia71 (from red-hat).
Is there an environment variable? Is it my red-hat drivers? Is
it my imagination? Clearly there is some kind of synchronization
problem for my performer town...
BTW, I saw the graphics cluster posts from Ken and went over
to see it since Ken is in the building right next to me. He's
right - it IS very cool. But I saw the same tearing there too...
Different problem??
ml
-- Michael Logan Raytheon ITSS Human Factors Research Lab NASA Ames Research Center mlogan++at++mai.arc.nasa.govTom Flynn wrote:
> On Thu, 27 Sep 2001, Yves Strube wrote: > > > I also know that Performer needs the GLX extension GLX_SGI_video_sync to > > really detect the vertical sync. The NVIDIA driver does not implement > > the server side of this extension so that it is not reported to > > Performer. > > the client-side extension checking is fixed in pf 2.4.2. in the case of > GLX_SGI_video_sync on NVidia, it doesn't matter because > glXWaitVideoSyncSGIX() doesn't work correctly anyway (it returns > immediately no matter what you give it if I remember correctly), so > currently, the use of that extension is diabled for NVidia hw. > > performer uses this extension for frame-rate control and not buffer > swapping. buffer swapping is done via glXSwapBuffers(). it is up to the > GL driver to actually swap on vertical retrace. > > > 1. Does anyone else observe these cuts in the rendered image? > > The tearing you're seeing is possible on NV10 and NV10gl (GeForce 256 and > Quadro) because it's emulated in software. NV15 (GeForce2 GTS), NV11 > (GeForce2MX), and higher have hw support for sync on vblank and it should > work correctly. > > hope that helps, > tom > -- > "Mongooses are famous for their snake-fighting ability, and are > almost always victorious because of their speed, agility, and timing > and also because of their thick coat." > > ----------------------------------------------------------------------- > List Archives, FAQ, FTP: http://www.sgi.com/software/performer/ > Open Development Project: http://oss.sgi.com/projects/performer/ > Submissions: info-performer++at++sgi.com > Admin. requests: info-performer-request++at++sgi.com > -----------------------------------------------------------------------
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