[vtkusers] Help with installation

[Vikram Mehta]

Hi,

I tried sudo yum install opengl but it said Nothing to do and also looked in
the
etc/X11/xorg.conf for a load glx but that does not exist either.

I am an absolute beginner and do not know what all of this means.

Is there anything else I could do ?

Vikram.


On Fri, Oct 29, 2010 at 1:10 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> On Fri, Oct 29, 2010 at 5:49 AM, David Doria <daviddoria at gmail.com> wrote:
> > On Fri, Oct 29, 2010 at 7:36 AM, Vikram Mehta <vvmehta at gmail.com> wrote:
> >>
> >> Hi David,
> >>
> >> I went through the instructions step by step to build the Cone example
> >> (Tutorial directory - Step 1) but this is the error I received :
> >>
> >> [100%] Built target Cone2
> >> [vm308 at dyn109-239 bin]$ ./Cone2
> >> Xlib:  extension "GLX" missing on display ":0.0".
> >> Xlib:  extension "GLX" missing on display ":0.0".
> >> Xlib:  extension "GLX" missing on display ":0.0".
> >> Xlib:  extension "GLX" missing on display ":0.0".
> >
> > It sounds like you don't have openGL installed. You probably need to do
> > sudo yum install opengl* gl* libgl*
> > or something like that.
> > I'm actually surprised that VTK built properly without opengl installed -
> > can anyone comment on that?
>
> It is possible to have OpenGL installed but to still not have glx on
> the X server.  For example, this can occur if you use vnc, because
> vncserver's X server does not support the glx extension.  If that is
> the case, it will be necessary to use Mesa instead of OpenGL.
>
> Another possibility is that Vikram is using an X server that does
> support glx, but doesn't load it.  The "Module" section in
> /etc/X11/xorg.conf must include the following line:
>
>    Load "glx"
>
> If it doesn't, then glx will not be present on the X server.
>
>  David
>
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