From: Axel Kohlmeyer (
Date: Tue May 10 2011 - 10:39:44 CDT

On Tue, May 10, 2011 at 10:27 AM, Robert Wohlhueter
<> wrote:
> I've been using VMD1.9beta3 my box (Ubuntu 10.04, AMD64-bit, with Nvidia GTX
> 275 graphics, NVIDIA driver 260.19.36) successfully for a month now.  I
> thought I would do myself the favor of springing for a second monitor.  The
> dual screen layout set up smoothly in the NVIDIA S Server Settings software,
> and works as expected for most routine purposes.
> But when I now try to start VMD I get an "invalid window parameter error",
> specifically:

this is just a wild stab, but could it be that you are using
a compositing window manager?

i remember that we had discussions in the past that using the composite
extension would mess with (some?) OpenGL applications in ways that
would create problems.


> Info) VMD for LINUXAMD64, version 1.9beta3 (March 7, 2011)
> 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, 4 CPUs detected.
> Info) Free system memory: 7283MB (91%)
> Info) Creating CUDA device pool and initializing hardware...
> Info) Detected 1 available CUDA accelerator:
> Info)   [0] GeForce GTX 275    30 SM_1.3 @ 1.44 GHz,  895MB RAM, KTO, OIO,
> XRequest.137: BadWindow (invalid Window parameter) 0x5200092
> Info) OpenGL renderer: ErrorUnknown
> Info)   Features:
> Info)   GLSL rendering mode is NOT available.
> Info) Dynamically loaded 2 plugins in directory:
> Info) '/usr/local/bin/vmd-1.9/plugins/LINUXAMD64/molfile'.
> vmd > Info) VMD for LINUXAMD64, version 1.9beta3 (March 7, 2011)
> **********************************************************************
> This isn't a specific VMD problem; I get analogous errors also with PyMol
> and Chimera.  But I can glean no help from the web at large, so thought I
> would see if other VMDers had had a similar problem.  I'm totally at a loss,
> and would appreciate any hints.
> Bob Wohlhueter

Dr. Axel Kohlmeyer
Institute for Computational Molecular Science
Temple University, Philadelphia PA, USA.