VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Wed May 17 2006 - 13:07:24 CDT

Hi,
  Ah, now I see what the problem is. The scanline interleaved modes
won't be usable with these glasses. You're going to have to use
real quad buffered stereo, as I don't see any other way that those
glasses will work with VMD. That's very dependent on the video driver,
and unless I'm mistaken, the Linux ATI driver doesn't have support for
those video modes on an ATI Radeon 9200. That being the case, you may
have to use Windows with those glasses until you find a Linux driver
that'll drive the emitter and provide proper quad buffering. If anyone
else has these glasses and has found a solution on Linux for ATI cards,
please speak up.

  John Stone
  vmd_at_ks.uiuc.edu

On Tue, May 16, 2006 at 03:13:55PM -0400, Osmany guirola Cruz wrote:
> Sorry was my mistake. i have a 60GX NUVISION with and IR EMITER and LCD
> GLASSES
> http://www.stereo3d.com/60gx.htm <----this is my stereo
> with my ATI card "9200" I can not use QUADBUFFER and I think that my
> solution with vmd is the use of " scanline interleaved " but with my
> emiter i think that i have to use and interlace video mode.
>
> and when i use setenv VMDDISABLEATILINUXWORKAROUND 1
> vmd crash
>
> On Tue, 2006-05-16 at 10:47 -0500, John Stone wrote:
> > Hi,
> > When I use the Eye3D emitter on Linux, I don't have to create any
> > special X configuration or used an interlaced video mode. The scanline
> > interleaved stereo mode in VMD works by drawing the left/right images
> > in the even/odd (or vice versa) scanlines on the CRT. This works with
> > the Eye3D 4-in-1 emitter, which has what they call a "line blanking"
> > stereo mode. The line blanking stereo mode doesn't depend on using
> > interlaced video, so if you have the 4-in-1 emitter, it shouldn't
> > be necessary to mess with the video mode, you just need the stencil
> > buffer to work. Since you have an ATI card, VMD is disabling some
> > of the OpenGL features to prevent potential problems with buggy
> > ATI Linux drivers (both open source, and the ATI-provided ones...)
> > This safety feature may be interfering with your ability to use
> > the scanline interleaved stereo mode. Try doing this before you
> > run VMD and see if you get different results (csh syntax):
> > setenv VMDDISABLEATILINUXWORKAROUND 1
> >
> > This enables the full VMD OpenGL feature set despite the detection
> > of the ATI video card. (e.g. no safety net, better hope you have
> > a non-buggy ATI driver...)
> >
> > Try that and let me know what happens.
> >
> > John Stone
> > vmd_at_ks.uiuc.edu
> >
> >
> > On Tue, May 16, 2006 at 08:33:00AM -0400, Osmany guirola Cruz wrote:
> > > Yes i do that many times ,but when i change to an interlaced mode my
> > > screen look "BAD" horizontal lines are out of synch
> > >
> > > On Mon, 2006-05-15 at 17:00 -0500, Sabuj Pattanayek wrote:
> > > > In order to get interlaced mode don't you need to set modelines with
> > > > "interlaced" at the end of the modeline string?
> > > >
> > > > see http://xtiming.sourceforge.net/
> > > >
> > > > Put the modelines in your monitor section and put the associated mode in
> > > > the "Screen" section. You can get the specific frequency limits and max
> > > > pixel clock values from the EDID information in your /var/log/Xorg.0.log .
> > > >
> > > >
> > > > Osmany guirola Cruz wrote:
> > > >
> > > > > my problem is with the xorg.conf file. to use scanline interleaved I
> > > > > need the "interlace mode" in my X, but i am having problems trying to
> > > > > set this mode :( I tested vmd in the same machine but with MS WINDOWS
> > > > > and works perfectly ...then my problenm is with interlace mode in
> > > > > Linux .
> > > > > what can i do?
> > > > > Thanks
> > > > > Osmany
> > > > >
> > 

-- 
NIH Resource for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
Email: johns_at_ks.uiuc.edu                 Phone: 217-244-3349
  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078