From: John Stone (
Date: Thu Sep 17 2009 - 21:34:36 CDT

  I'm puzzled at the error you're seeing. I'll have to look
into this. It's possible that it is failing due to lack of RAM,
as I note that the device only reports having 127MB of RAM available,
and this would likely be inadequate to do very much with CUDA in VMD
anyway. Can you run any of the CUDA SDK examples on this card?

  John Stone

On Thu, Sep 17, 2009 at 07:33:51PM -0500, Jim Parker wrote:
> Hello,
> I've recently installed VMD on a Ubuntu 8.10 system and followed the
> install directions in ig.pdf. I have most things working now, thanks to
> help on this site. However, at start up I get the following message.
> Info) VMD for LINUX, version 1.8.7 (August 1, 2009)
> Info)
> Info) Email questions and bug reports to
> Info) Please include this reference in published work using VMD:
> Info) Humphrey, W., Dalke, A. and Schulten, K., `VMD - Visual
> Info) Molecular Dynamics', J. Molec. Graphics 1996, 14.1, 33-38.
> Info) -------------------------------------------------------------
> Info) Multithreading available, 2 CPUs detected.
> Info) Free system memory: 1346MB (66%)
> Info) Detected 1 available CUDA accelerator:
> Info) [0] Quadro NVS 135M 1 SM_1.1 @ 0.80 GHz, 127MB RAM, KTO, OIO
> Info) Creating CUDA device pool and initializing hardware...
> CUDA error: no CUDA-capable device is available, line 62
> Warning) Detected X11 'Composite' extension: if incorrect display occurs
> Warning) try disabling this optional X server feature.
> Info) OpenGL renderer: Quadro NVS 135M/PCI/SSE2
> Info) Full GLSL rendering mode is available.
> Info) Textures: 2-D (8192x8192), 3-D (2048x2048x2048), Multitexture (4)
> vmd >
> The default configure file detects my NVIDIA Quadro NVS 135M card which
> is CUDA capable--albeit a low end card (256MB RAM--interesting that VMD
> says 127MB...)
> and then says that no CUDA device is available...
> There are 2 warnings related to X11 'composite' extension which I don't
> know if they are related to the CUDA issue.
> I did check that my CUDA and video drivers are upto date per this thread
> I have CUDA 2.3 installed with Driver version 190.18.
> Thanks in advance.
> Cheers,
> --Jim Parker
> UTSA Physics and Astronomy

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