[Chimera-users] CHIMERA: help with stereo viz on new samsung "3D" LCD and quadro card

Peter Engelhardt peter.engelhardt at helsinki.fi
Fri Mar 7 09:43:20 PST 2014


Sorry2 for a typo - now corrected:

Dear Chimera,

We recently got a mail on instruction to install correct parameters to  
get VMD-L to work:

"vmd-l: help with stereo viz on new samsung "3D" LCD and quadro card"

Now we ask, do you have any suggestions to get "Samsung "3D" LCD and  
quadro card" to work - not only for:

1. Linux (Ubuntu) with "quadro card"

but also and on:

2. MacPro/Mavericks with "a quadro card"

We thank you in advance

Cheers
Peter et al.

Quoting John Stone <johns at ks.uiuc.edu>:

[Hide Quoted Text]
Carlos,
   Ah, I had missed the startup message you included when I read
your first note.  All of the VMD stereo modes other than "QuadBuffered"
are implemented by rendering code within VMD itself, and they do not
depend on the graphics driver or any special hardware capabilities.
So, the fact that you are able to use the "SideBySide" or other modes
just indicates that your TV can work with the VMD-supplied mode, but
that's separate from the issue of having the Quadro's stereo sync and
other features working.

The VMD "QuadBuffered" stereo mode relies entirely on the GPU and
its driver for stereoscopic display.  This is the best mode to use
if you want the IR or RF stereo emitter to remain in proper sync with
the displayed images, but it requires that the GPU drivers and windowing
system be configured correctly, and that the GPU and driver will actually
support the target display.  If you're running on Linux, then the thing
to do is to check the contents of /var/log/Xorg.0.log and look for
the word "Stereo".  Here's an example of the kinds of output you're looking
for, as seen on a couple of our machines:
   (**) NVIDIA(1): Option "Stereo" "10"
   (**) NVIDIA(1): Option "ForceStereoFlipping" "true"

Here's a machine that has stereo enabled:
(II) Setting vga for screen 0.
(II) Setting vga for screen 1.
(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(0): Option "MetaModes" "2560x1600 +0+0"
(**) Feb 17 16:21:29 NVIDIA(0): Enabling 2D acceleration
(II) Feb 17 16:21:29 NVIDIA(0): Display (Samsung SyncMaster (DFP-0))  
does not support NVIDIA
(II) Feb 17 16:21:29 NVIDIA(0):     3D Vision stereo.
(II) Feb 17 16:21:29 NVIDIA(0): NVIDIA GPU Quadro 7000 (GF110GL) at  
PCI:8:0:0 (GPU-0)
(--) Feb 17 16:21:29 NVIDIA(0): Memory: 6291456 kBytes
(--) Feb 17 16:21:29 NVIDIA(0): VideoBIOS: 70.10.4a.00.01
(II) Feb 17 16:21:29 NVIDIA(0): Detected PCI Express Link width: 16X
(--) Feb 17 16:21:29 NVIDIA(0): Valid display device(s) on Quadro 7000  
at PCI:8:0:0
(--) Feb 17 16:21:29 NVIDIA(0):     CRT-0
(--) Feb 17 16:21:29 NVIDIA(0):     CRT-1
(--) Feb 17 16:21:29 NVIDIA(0):     Samsung SyncMaster (DFP-0) (boot,  
connected)
(--) Feb 17 16:21:29 NVIDIA(0):     DFP-1
(--) Feb 17 16:21:29 NVIDIA(0): CRT-0: 400.0 MHz maximum pixel clock
(--) Feb 17 16:21:29 NVIDIA(0): CRT-1: 400.0 MHz maximum pixel clock
(--) Feb 17 16:21:29 NVIDIA(0): Samsung SyncMaster (DFP-0): Internal  
Dual Link TMDS
(--) Feb 17 16:21:29 NVIDIA(0): Samsung SyncMaster (DFP-0): 330.0 MHz  
maximum pixel clock
(--) Feb 17 16:21:29 NVIDIA(0): DFP-1: Internal Single Link TMDS
(--) Feb 17 16:21:29 NVIDIA(0): DFP-1: 330.0 MHz maximum pixel clock
(**) Feb 17 16:21:29 NVIDIA(0): Using HorizSync/VertRefresh ranges  
from the EDID for display
(**) Feb 17 16:21:29 NVIDIA(0):     device Samsung SyncMaster (DFP-0)  
(Using EDID frequencies
(**) Feb 17 16:21:29 NVIDIA(0):     has been enabled on all display devices.)
(II) Feb 17 16:21:29 NVIDIA(0): Validated MetaModes:
(II) Feb 17 16:21:29 NVIDIA(0):     "2560x1600+0+0"
(II) Feb 17 16:21:29 NVIDIA(0): Virtual screen size determined to be  
2560 x 1600
(--) Feb 17 16:21:29 NVIDIA(0): DPI set to (101, 101); computed from  
"UseEdidDpi" X config
(--) Feb 17 16:21:29 NVIDIA(0):     option
(**) NVIDIA(1): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(1): RGB weight 888
(==) NVIDIA(1): Default visual is TrueColor
(==) NVIDIA(1): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(1): Option "Stereo" "10"
(**) NVIDIA(1): Option "ForceStereoFlipping" "true"
(**) Feb 17 16:21:29 NVIDIA(1): USB IR emitter stereo requested
(WW) Feb 17 16:21:29 NVIDIA(1): For stereo to work with Xinerama,  
stereo X configuration
(WW) Feb 17 16:21:29 NVIDIA(1):     option should be enabled on all X  
screens in the X server.
(WW) Feb 17 16:21:29 NVIDIA(1):     Stereo is disabled on one (or  
more) X screens, while
(WW) Feb 17 16:21:29 NVIDIA(1):     Xinerama is enabled. Stereo  
visuals will not be
(WW) Feb 17 16:21:29 NVIDIA(1):     available.
(**) Feb 17 16:21:29 NVIDIA(1): OpenGL stereo forced
(**) NVIDIA(1): Option "MetaModes" "nvidia-auto-select +0+0"
(**) Feb 17 16:21:29 NVIDIA(1): Enabling 2D acceleration
(II) Feb 17 16:21:29 NVIDIA(0): Display (Acer HN274H (DFP-0)) supports  
NVIDIA 3D Vision
(II) Feb 17 16:21:29 NVIDIA(0):     stereo.
(II) Feb 17 16:21:29 NVIDIA(1): NVIDIA GPU Quadro 7000 (GF110GL) at  
PCI:9:0:0 (GPU-1)
(--) Feb 17 16:21:29 NVIDIA(1): Memory: 6291456 kBytes






Here's a machine that has stereo disabled currently:
(II) Setting vga for screen 0.
(**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
(==) NVIDIA(0): RGB weight 888
(==) NVIDIA(0): Default visual is TrueColor
(==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
(**) NVIDIA(0): Option "Stereo" "0"
(**) NVIDIA(0): Option "nvidiaXineramaInfoOrder" "DFP-3"
(**) Feb 17 17:20:19 NVIDIA(0): Stereo disabled by request
(**) NVIDIA(0): Option "MetaModes" "DFP-0: nvidia-auto-select  
+2560+520, DFP-3: 2560x1600 +0+0; DFP-0: nvidia-auto-select +2560+0,  
DFP-3: 2560x1600 +0+0; DFP-0: nvidia-auto-select +0+0, DFP-3:  
nvidia-auto-select +1920+0"
(**) Feb 17 17:20:19 NVIDIA(0): Enabling 2D acceleration
(II) Feb 17 17:20:21 NVIDIA(0): Display (Acer HN274H (DFP-0)) supports  
NVIDIA 3D Vision
(II) Feb 17 17:20:21 NVIDIA(0):     stereo.
(II) Feb 17 17:20:21 NVIDIA(0): Display (HP ZR30w (DFP-3)) does not  
support NVIDIA 3D Vision
(II) Feb 17 17:20:21 NVIDIA(0):     stereo.
(II) Feb 17 17:20:21 NVIDIA(0): NVIDIA GPU Quadro K6000 (GK110BGL) at  
PCI:131:0:0 (GPU-0)
(--) Feb 17 17:20:21 NVIDIA(0): Memory: 12582912 kBytes
(--) Feb 17 17:20:21 NVIDIA(0): VideoBIOS: 80.80.16.00.01
(II) Feb 17 17:20:21 NVIDIA(0): Detected PCI Express Link width: 16X
(--) Feb 17 17:20:21 NVIDIA(0): Valid display device(s) on Quadro  
K6000 at PCI:131:0:0
(--) Feb 17 17:20:21 NVIDIA(0):     CRT-0
(--) Feb 17 17:20:21 NVIDIA(0):     Acer HN274H (DFP-0) (boot, connected)
(--) Feb 17 17:20:21 NVIDIA(0):     DFP-1
(--) Feb 17 17:20:21 NVIDIA(0):     DFP-2
(--) Feb 17 17:20:21 NVIDIA(0):     HP ZR30w (DFP-3) (connected)
(--) Feb 17 17:20:21 NVIDIA(0):     DFP-4
(--) Feb 17 17:20:21 NVIDIA(0):     DFP-5
(--) Feb 17 17:20:21 NVIDIA(0): CRT-0: 400.0 MHz maximum pixel clock
(--) Feb 17 17:20:21 NVIDIA(0): Acer HN274H (DFP-0): Internal Dual Link TMDS
(--) Feb 17 17:20:21 NVIDIA(0): Acer HN274H (DFP-0): 330.0 MHz maximum  
pixel clo


On Tue, Feb 18, 2014 at 08:06:04AM -0500, Carlos Simmerling wrote:
Hi John,
thanks for the quick reply.
I included VMD's output in my original post- yes, it says stereo, and
I can indeed get VMD to do stereo if I pick side by side mode in VMD.
I'm using win 7 pro (though I'd upgrade to win 8 if I knew that would
solve the problem). The TV is HDMI only, unfortunately. The quadro
card has only DVI outputs, so I'm using a DVI to HDMI cable.

I'm hoping to find a way to do quad buffered stereo at a reasonable
refresh rate.
Carlos

On Mon, Feb 17, 2014 at 12:53 PM, John Stone <johns at ks.uiuc.edu> wrote:
Hi Carlos,
    I'm not familiar with the TV you're using, but I can say a few
things that are broadly true of a wide range of HDTVs that support
stereo that may also apply in your case.

If a TV has a DVI input (unlikely), then one is sometimes able to use it
just like any other stereo display.

If the TV uses HDMI, then the options for stereo will depend
somewhat on which operating system the computer is running what
video card, and what driver are being used.

In regards to the NVIDIA GPUs, the "Quadro" GPUs have the best support
for stereoscopic display across all OS platforms.  Last I knew however,
HDTVs are considered a special case, and at least on the Windows platform
there was/is a special driver that one had to use to allow stereoscopic
display to an HDTV over HDMI (3DTV Play) for games and the like:
    http://www.nvidia.com/object/3dtv-play-overview.html

I just looked up the NVIDIA web site regarding stereoscopic display,
and they have clearly rewritten much of it since the last time I looked:
    http://www.nvidia.com/object/3d-vision-professional-users.html

I would expect that the Quadro would have a good chance of working with
a 3D HDTV, but you will likely have to set the NVIDIA driver's stereo
mode to one that your TV agrees with.   If you tell me which OS
you're running, we can work through a few of the details there.
The most important thing is to see if VMD lists "STEREO" during the
OpenGL feature startup messages that it prints to the text console.

Cheers,
    John Stone
    vmd at ks.uiuc.edu

On Fri, Feb 14, 2014 at 02:25:25PM -0500, Carlos Simmerling wrote:
Hi all,

I'm trying to optimize my stereo viewing.
I have windows 7 pro, a quadro fx-4600 and a samsung UN60F8000BF LCD
TV (http://www.samsung.com/us/video/tvs/UN60F8000BFXZA) that came with
active stereo glasses. I also have an old stereographics emitter with
3-pin DIN connector that plugs into my quadro card, along with some
stereographics glasses. VMD tells me this at startup:
Info) OpenGL renderer: Quadro FX 4600/PCIe/SSE2
Info)   Features: STENCIL STEREO MDE CVA MTX NPOT PP PS GLSL(OVF)

So, what I need help with is optimizing my 3D viewing. So far I can
only get this setup to work when I select side by side 3D in VMD, and
on the TV I also select side by side and use the glasses that came
with it. It's ok, but the glasses are cheap and there's some bleed
through, and of course I lose resolution.

I suspect I'd be better off using the emitter and the expensive SG
glasses. When I plug in the emitter, the red light goes on so it seems
to be working. If I select stereo/quadbuffered in VMD, it looks like
it's doing the right thing, but using the SG glasses doesn't seem to
sync properly.

A few other questions:
1) do the settings in the Nvidia control panel under "manage 3D
settings" impact VMD? In there you can choose the 3D mode,
antialiasing, etc. I don't know if that controls the openGL part.
2) Is it possible to send a >60HZ signal to these screens? It claims
it is 240Hz, but I don't know if that's internal interpolation or
accepts inputs >60Hz.

thanks!
--
NIH Center for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
http://www.ks.uiuc.edu/~johns/           Phone: 217-244-3349
http://www.ks.uiuc.edu/Research/vmd/
--
NIH Center for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
http://www.ks.uiuc.edu/~johns/           Phone: 217-244-3349
http://www.ks.uiuc.edu/Research/vmd/
-- 
-- 
___________________________________________________________
Peter Engelhardt, PhD, docent
Adjunct Professor in Molecular Genetics
Unit of Molecular Electron Tomography
Department of Pathology
Haartman Institute
P.O.Box 21 (Haartmaninkatu 3)
FIN-00014 University of Helsinki,
Finland

Email: Peter.Engelhardt at Helsinki.Fi
URL: http://www.lce.hut.fi/~engelhar/

Department of Pathology lab. tel: (+358-9)-19126729, 19126442
EM-lab, Tel: (+358-9)-19126261
Fax: (+358-9)-19126700 (Dept. of Pathology)

Nanomicroscopy Center,
Department of Applied Physics
Aalto University, School of Science and Technology,
Puumiehenkuja 2, FI02150 Espoo
Finland

Mobil: +358-400193342
Home address:
Lindstedstvägen 1 B 7
FIN-02700 Grankulla,
Finland
Home Tel: +358400193342



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