Hi,<br><br>I tried sudo yum install opengl but it said Nothing to do and also looked in the <br>etc/X11/xorg.conf for a load glx but that does not exist either.<br><br>I am an absolute beginner and do not know what all of this means.<br>
<br>Is there anything else I could do ?<br><br>Vikram.<br><br><br><div class="gmail_quote">On Fri, Oct 29, 2010 at 1:10 PM, David Gobbi <span dir="ltr"><<a href="mailto:david.gobbi@gmail.com">david.gobbi@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><div></div><div class="h5">On Fri, Oct 29, 2010 at 5:49 AM, David Doria <<a href="mailto:daviddoria@gmail.com">daviddoria@gmail.com</a>> wrote:<br>
> On Fri, Oct 29, 2010 at 7:36 AM, Vikram Mehta <<a href="mailto:vvmehta@gmail.com">vvmehta@gmail.com</a>> wrote:<br>
>><br>
>> Hi David,<br>
>><br>
>> I went through the instructions step by step to build the Cone example<br>
>> (Tutorial directory - Step 1) but this is the error I received :<br>
>><br>
>> [100%] Built target Cone2<br>
>> [vm308@dyn109-239 bin]$ ./Cone2<br>
>> Xlib: extension "GLX" missing on display ":0.0".<br>
>> Xlib: extension "GLX" missing on display ":0.0".<br>
>> Xlib: extension "GLX" missing on display ":0.0".<br>
>> Xlib: extension "GLX" missing on display ":0.0".<br>
><br>
> It sounds like you don't have openGL installed. You probably need to do<br>
> sudo yum install opengl* gl* libgl*<br>
> or something like that.<br>
> I'm actually surprised that VTK built properly without opengl installed -<br>
> can anyone comment on that?<br>
<br>
</div></div>It is possible to have OpenGL installed but to still not have glx on<br>
the X server. For example, this can occur if you use vnc, because<br>
vncserver's X server does not support the glx extension. If that is<br>
the case, it will be necessary to use Mesa instead of OpenGL.<br>
<br>
Another possibility is that Vikram is using an X server that does<br>
support glx, but doesn't load it. The "Module" section in<br>
/etc/X11/xorg.conf must include the following line:<br>
<br>
Load "glx"<br>
<br>
If it doesn't, then glx will not be present on the X server.<br>
<font color="#888888"><br>
David<br>
</font></blockquote></div><br>