[Chimera-users] chimera performance

Bala subramanian bala.biophysics at gmail.com
Fri May 8 00:49:54 PDT 2009

Dear Greg,
After installing nvidia graphics drivers, i am not able to open chimera. I
have attached the xconfig file and the output of glxinfo as text files.

*[cbala at ramana ~]$ chimera
Traceback (most recent call last):
  File "/usr/local/chimera/share/__main__.py", line 65, in <module>
    value = chimeraInit.init(sys.argv)
  File "/usr/local/chimera/share/chimeraInit.py", line 361, in init
    tkgui.initializeGUI(exitonquit, debug_opengl)
  File "CHIMERA/share/chimera/tkgui.py", line 2525, in initializeGUI
  File "/usr/local/chimera/lib/python2.5/site-packages/PIL/__init__.py",
line 309, in checkConfig

  File "/usr/local/chimera/lib/python2.5/site-packages/Togl.py", line 27, in
    Tkinter.Widget.__init__(self, master, "togl", cnf, kw)
  File "/usr/local/chimera/lib/python2.5/lib-tk/Tkinter.py", line 1930, in
    (widgetName, self._w) + extra + self._options(cnf))
_tkinter.TclError: could not create rendering context
Couldn't configure togl widget*

I installed the nvidia driver as follows. I installed it based on the
information given in the nvidia install guide in the following link.


su -c 'rpm -ivh
su -c 'rpm -ivh
su -c 'rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-*'
su -c 'yum install kmod-nvidia'

Then i gave the following command

nvidia-xconfig  as root. Then i restarted the system. Now i am able to see
nvidia display setting. When i give chimera, it dosent work.


On Thu, May 7, 2009 at 8:44 PM, Greg Couch <gregc at cgl.ucsf.edu> wrote:

> Looking at your chimera benchmark scores and at the scores on the web page,
> http://socrates2.cgl.ucsf.edu/trac/chimera/wiki/benchmarks, it looks like
> you don't have the NVidia graphics driver installed.  And that would make a
> *huge* difference.  To double-check, run the glxinfo command and look at the
> "OpenGL renderer string:" line, it should have NVIDIA in it instead of Mesa.
>  To get the NVidia drivers, go to <
> http://www.nvidia.com/Download/index.aspx>.
>         - Greg
> On Thu, 7 May 2009, Bala subramanian wrote:
>  Dear Greg,
>> You are right. Previously it was normal but now it is slow. I havent
>> updated
>> the kernel. I checked and noticed that i dnt have any memory intensive
>> background jobs also.
>> I did benchmarks with two chimera versions 1.3 (attached file chim_test)
>> and
>> chimera 1.4 (attached chim_test1).
>> My graphics card is nVIDIA GETFORCE 9300MG, VRAM: 256 MB. I dnt know how
>> to
>> compare and judge what is going wrong. I wud appreciate your help on the
>> same.
>> Thanks,
>> Bala
>> So it was formerly fast on the same computer?  This could happen on a
>> Linux
>>> computer if you updated the kernel and forgot to reinstall the graphics
>>> driver (from ATI or NVidia, the open source 3D drivers still need work,
>>> but
>>> are improving).  Another possibility, on all operatings sytems, is that
>>> there is a background process that is using a lot of CPU or memory, so
>>> chimera doesn't have the resources it used to.
>>> If you just want to check the graphics performance, then you can use the
>>> Benchmark tool in Tool / Utilities to guage the current performance.  And
>>> then you can compare to the reported scores to see if your graphics
>>> performance is reasonable (the Show button in the Benchmark tool brings
>>> up
>>> the web page).
>>>       - Greg
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