VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Tue Sep 20 2005 - 11:29:30 CDT

Dan,
  The root of your problem is shown in the startup text that VMD is printing
about the OpenGL Renderer: "Mesa GLX Indirect"
That indicates that rather than using the hardware accelerator, your X
server (and thus VMD) are using the Mesa software renderer in an indirect
OpenGL context, which is the least desirable option of the various
possibilities. See if you get the same output from 'glxinfo'.
Most likely you've got the kernel driver running etc, but the X server
isn't talking to it yet, which means you need to twiddle your X config
file settings. I've gotta run, but let us know if you need more help on this.

  John Stone
  vmd_at_ks.uiuc.edu

On Tue, Sep 20, 2005 at 12:13:58PM -0400, Dan Strahs wrote:
>
> Hi:
>
> I am having a problem with coloring my MSMS-generated surface by
> electrostatic potential. I have APBS installed; in the potential file I've
> uploaded, I know that the maximum/minimum run from approx. -1500 to +1000.
> Yet my surface remains stubbornly white. I've loaded the potential as a DX
> format, I've tried both the graphics trajectory tab and the "color
> scale method RWB" "color scale min -5.0" "color scale max 5.0": no change.
> Altering the range from -0.001/0.001 to -1500/1000 has no effect.
>
> I've enabled the 3d_accelerator: I have Dell GX270 with an Intel 82865G
> chipset on the motherboard. Since I'm running Linux (RH9), I'm using
> XFree86-4.3.0-2.90.55. I have DRI enabled with the i830 driver - the i830
> kernel module is loaded.
>
> VMD starts with:
> Info) Multithreading available, 1 CPU detected.
> Info) OpenGL renderer: Mesa GLX Indirect
> Info) Features: RN MTX
> Info) GLSL rendering mode is NOT available.
> Info) Textures: 2-D (2048x2048), Multitexture (6)
>
> Is there some clue here about what's happening? I've uploaded the makefile
> output from the VMD and plugins compile (with configure options LINUX
> OPENGL FLTK TK IMD TCL PTHREADS ACTC PYTHON NUMPY) at these links:
> http://storage.pace.edu/DStrahs/Research/make.log?uniq=-o8hxtn
> http://storage.pace.edu/DStrahs/Research/log.LINUX?uniq=-o8hxts
>
> I would be grateful for any help (other than recommending a different
> graphics card).
>
> Dan Strahs 

-- 
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