Hello Hari,

I had some flickering problems when I first tried the stereo mode on an Alienware LCD display. There is one option in the Nvidia driver that seems to keep the display at 60Hz, it is called "Force Full GPU Scaling". Make sure that the option is turned off, otherwise you won't be able to reach 120Hz. Anyway, I don't think that a modeline is mandatory.

However, nothing is perfect ... On my display only 2/3 of the screen displays a "proper" 3D effect, but it seems to be caused by the technology itself. You can still compensate a little by tweaking some stereo options (go to the edit all... menu in setting and filter for "stereo"). Adjusting the stereo_angle and/or the the stereo_shift might help you.

Hope this helps !

Marc

Le 21 juil. 2011 à 14:05, hari jayaram a écrit :

Thanks Rafael and Jason,
I upgraded to the latest driver version for Linux i.e 275.19  and now have  stereo working with some caveats.

I am running the PLANAR SA2311 at 120 Hz and 1920x1080 resolution and the stereo is rather finicky with the nvidia 3dvision setup. 

I see a lot of random stereo image flips , i.e suddenly during a rotation the parts of the molecule that are going into the plane of the screen, now start coming right at you. Also during stereo viewing , the distant parts of the molecule seem to not show up as stereo sometimes , i.e I see two helical chains , instead of one stereo chain while at the same time the  parts of the molecule closest to you are nicely displayed.
Whenever that happens re-sizing the screen , makes the stereo jerk back into sync ..till a few minutes later it goes out of whack again. 

Here are what I tried to get the stereo visual to stay stable and behave:
1) I tried fiddling with the scroll wheel at the back of the cutoff-pyramid emitter box . But didnt see any difference.
2) A dark or bright room still had no impact 
3) I tried turning off the other LCD sitting next to it ..and this didnt have any effect
4) The emitter position also didnt seem to effect the stability of the stero visual

I noticed from the xorg.conf that I am using a metamode 1920x1080_120. Does anyone have a modeline for the SA2311W that gives them stable stereo.
Could it be that the 275.19 driver is worse than other earlier versions 

longing for the stable CRT stereo from the past

Hari
Pymol Version : svn 1.4.1
Pymol startup:

Detected OpenGL version 2.0 or greater.  Shaders available.
 Detected GLSL version 3.30.
 OpenGL graphics engine:
  GL_VENDOR: NVIDIA Corporation
  GL_RENDERER: Quadro FX 3700/PCI/SSE2
  GL_VERSION: 3.3.0 NVIDIA 275.19
 Adapting to Quadro hardware.
 Detected 8 CPU cores.  Enabled multithreaded rendering.
 OpenGL quad-buffer stereo 3D detected and enabled.









On Wed, Jul 20, 2011 at 2:46 PM, Jason Vertrees <jason.vertrees@schrodinger.com> wrote:
Hi Hari,

Please update your driver and ensure that your monitor's refresh rate is 120 Hz.

Cheers,

-- Jason

On Wed, Jul 20, 2011 at 12:41 PM, hari jayaram <harijay@gmail.com> wrote:
> Hi,
> I am using the nvidia driver : 195.36.24
> OS: Ubuntu Lucid lynx 10.04 , 64 bit
> I have a "working" xinerama config with two LCD screens one a regular dell
> LCD at 2560x1600 and the other a stereo capable PLANAr LCD at 1920x1080.
> Both screens were configured to near working stereo based on the xorg.conf
> modified from the one Savvas N. Savvides sent to the newsgroup a while back.
> I have the nvidia 3dvision glasses and emmitter. I have the USB and
> 3-pin-din to 1/8" stereo connectors going from the Linux computer to the
> nvidia cut-off pyramid box. The light on the box with the nvidia logo stays
> green ,and the pymol structure on the screen  seems to flicker like working
> stereo.
> My problem is that the glasses which I turn on by pressing the switch on the
> ear-piece also have a green light, but the shutters dont seem to flicker and
> I consequently dont see stereo. Pymol does echo that a stereo capable
> monitor is present and enables stereo on startup.
> What am I doing wrong. I tried both "Option" "3" and "Option" "10" in
> devices section. But in the end I still dont have my glasses "wake up".
> Sorry to plague the bb with this stereo post. I am hoping I am 90% there to
> getting working stereo.
> My Xinerama xorg.conf file is pasted here
> Thanks for your help.
> Hari
>
> # nvidia-settings: X configuration file generated by nvidia-settings
> # nvidia-settings:  version 1.0  (buildd@yellow)  Fri Apr  9 11:51:21 UTC
> 2010
> # nvidia-xconfig: X configuration file generated by nvidia-xconfig
> # nvidia-xconfig:  version 1.0  (buildmeister@builder58)  Fri Mar 12
> 02:12:40 PST 2010
> # Device Config 1
> # Same device but diff device id
> # DUPLIACTES BECAUSE FILE APPENDED BY NVIDIA_SETTINGS IN UBUNTU
> Section "ServerLayout"
> # Removed Option "Xinerama" "1"
> # Removed Option "Xinerama" "0"
>     Identifier     "Dual Layout"
>     Screen      0  "Screen0" 0 0
>     Screen      1  "Screen1" RightOf "Screen0"
>     InputDevice    "Keyboard0" "CoreKeyboard"
>     InputDevice    "Mouse0" "CorePointer"
>     InputDevice    "Mouse0" "SendCoreEvents"
>     Option         "Clone" "off"
>     Option         "Xinerama" "1"
> EndSection
> Section "Files"
> EndSection
> Section "InputDevice"
>     # generated from default
>     Identifier     "Mouse0"
>     Driver         "mouse"
>     Option         "Protocol" "auto"
>     Option         "Device" "/dev/psaux"
>     Option         "Emulate3Buttons" "no"
>     Option         "ZAxisMapping" "4 5"
> EndSection
> Section "InputDevice"
>     # generated from default
>     Identifier     "Keyboard0"
>     Driver         "kbd"
> EndSection
> Section "Modes"
>     Identifier         "Modes[0]"
>     ModeLine     "2560x1600" 268.00 2560 2608 2640 2720 1600 1603 1609 1646
> +hsync +vsync
> EndSection
> Section "Modes"
>     Identifier         "Modes[1]"
>     ModeLine     "1920x1080@60" 148.50 1920 2008 2052 2200 1080 1084 1089
> 1125 +hsync +vsync
> EndSection
> Section "Monitor"
>     Identifier     "Monitor[0]"
>     VendorName     "Unknown"
>     ModelName      "Dell"
>     UseModes       "Modes[0]"
>     HorizSync       29.0 - 113.0
>     VertRefresh     49.0 - 86.0
>     Option         "DPMS"
> EndSection
> Section "Monitor"
>     Identifier     "Monitor[1]"
>     VendorName     "Unknown"
>     ModelName      "Dell"
>     UseModes       "Modes[1]"
>     HorizSync       30.0 - 140.0
>     VertRefresh     56.0 - 120.0
>     Option         "DPMS"
> EndSection
> Section "Monitor"
>     Identifier     "Monitor0"
>     VendorName     "Unknown"
>     ModelName      "Dell"
>     HorizSync       29.0 - 113.0
>     VertRefresh     49.0 - 86.0
> EndSection
> Section "Monitor"
>     Identifier     "Monitor1"
>     VendorName     "Unknown"
>     ModelName      "PLN SA2311W"
>     HorizSync       30.0 - 140.0
>     VertRefresh     56.0 - 120.0
> EndSection
> Section "Device"
>     Identifier     "Device0"
>     Driver         "nvidia"
>     VendorName     "NVIDIA Corporation"
>     BoardName      "Quadro FX 3700"
>     Option         "Stereo" "10"
> #    Monitor        "Monitor0"
>     Option         "XineramaStereoFlipping" "1"
>     Option         "NoPowerConnectorCheck"
>     Option         "AllowDFPStereo" "1"
>     Option         "UBB" "1"
>     BusID          "PCI:3:0:0"
>     Screen          0
> EndSection
> Section "Device"
>     Identifier     "Device1"
>     Driver         "nvidia"
>     VendorName     "NVIDIA Corporation"
>     BoardName      "Quadro FX 3700"
>     Option         "Stereo" "10"
> #    Monitor        "Monitor1"
>     Option         "XineramaStereoFlipping" "1"
>     Option         "NoPowerConnectorCheck"
>     Option         "AllowDFPStereo" "1"
>     Option         "UBB" "1"
>     BusID          "PCI:3:0:0"
>     Screen          1
> EndSection
> Section "Screen"
> #    BusID          "PCI:3:0:0"
>     Identifier     "Screen[0]"
>     Device         "Device0"
>     Monitor        "Monitor[0]"
>     DefaultDepth    24
>     Option         "Stereo" "10"
>     SubSection     "Display"
>         Viewport    0 0
>         Depth       24
>         Modes      "2560x1600"
>     EndSubSection
> EndSection
> Section "Screen"
>     Identifier     "Screen[1]"
>     Device         "Device0"
>     Monitor        "Monitor[1]"
>     DefaultDepth    24
>     Option         "Stereo" "10"
>     SubSection     "Display"
>         Viewport    0 0
>         Depth       24
>         Modes      "1920x1080@60"
>     EndSubSection
> EndSection
> Section "Screen"
>     Identifier     "Screen0"
>     Device         "Device0"
>     Monitor        "Monitor0"
>     Option          "Stereo" "10"
>     DefaultDepth    24
>     Option         "TwinView" "0"
>     Option         "metamodes" "DFP-0: 2560x1600 +0+0"
>     SubSection     "Display"
>         Depth       24
>     EndSubSection
> EndSection
> Section "Screen"
>     Identifier     "Screen1"
>     Device         "Device1"
>     Monitor        "Monitor1"
>     DefaultDepth    24
>     Option          "Stereo" "10"
>     Option         "TwinView" "0"
>     Option         "metamodes" "DFP-1: 1920x1080_120 +0+0"
>     SubSection     "Display"
>         Depth       24
>     EndSubSection
> EndSection
> Section "Extensions"
>     Option         "Composite" "Disable"
> EndSection
>
>
>
> ------------------------------------------------------------------------------
> 10 Tips for Better Web Security
> Learn 10 ways to better secure your business today. Topics covered include:
> Web security, SSL, hacker attacks & Denial of Service (DoS), private keys,
> security Microsoft Exchange, secure Instant Messaging, and much more.
> http://www.accelacomm.com/jaw/sfnl/114/51426210/
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--
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

(e) Jason.Vertrees@schrodinger.com
(o) +1 (603) 374-7120

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Learn 10 ways to better secure your business today. Topics covered include:
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