I have the same problem with ubuntu feisty and  an Ati  9100 video card. Driver are correctly installed, glxinfo return direct rendering on and glxgears work very well but when I run wxgazebo I get this error:

X Error of failed request:  GLXUnsupportedPrivateRequest
  Major opcode of failed request:  157 (GLX)
  Minor opcode of failed request:  16 (X_GLXVendorPrivate)
  Serial number of failed request:  21
  Current serial number in output stream:  22
server died
stopping server



 
----- Original Message -----
Sent: Sunday, June 03, 2007 11:17 PM
Subject: Re: [PlayerStage-Gazebo] X Error of failedrequest: GLXUnsupportedPrivateRequest

> Hello Man,
>
>    I had similar Problems with Fedora Core 6 as well.  First make sure
> you have Mesa installed as OpenGL Renderer. Second make sure SELinux
> Policy allows the use of OpenGL through wxgazebo or disable SELinux
> completely. That was my problem. I hope that helps you.
>
> Sincerly,
>
> Benjamin Chase
>
> Man Forast wrote:
>> Hi, I've problem with wxgazebo and gazebo too. When I try to run some
>> world I get this error message:
>>
>> X Error of failed request:  GLXUnsupportedPrivateRequest
>>   Major opcode of failed request:  143 (GLX)
>>   Minor opcode of failed request:  16 (X_GLXVendorPrivate)
>>   Serial number of failed request:  21
>>   Current serial number in output stream:  22
>> server died
>> stopping server
>>
>>
>> I try with all library SGIX GLX GLXP etc. but with same results!
>>
>> I have an ATI 9200 video card on Ubuntu Feasty and all work well less
>> gazebo. If I run " glxinfo | grep rendering" and "glxinfo |grep
>> vendor" commands on terminal the output is:
>>
>> -direct rendering: Yes
>>
>> -server glx vendor string: SGI
>>  client glx vendor string: SGI
>>  OpenGL vendor string: Tungsten Graphics, Inc.
>>
>> So, my open source driver work well and I don't know which is my
>> problem!!
>>
>> Can anyone help me?
>>
>> tnx in advance!
>> ------------------------------------------------------------------------
>>
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by DB2 Express
>> Download DB2 Express C - the FREE version of DB2 express and take
>> control of your XML. No limits. Just data. Click to get it now.
>>
http://sourceforge.net/powerbar/db2/
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Playerstage-gazebo mailing list
>>
Playerstage-gazebo@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo
>>  
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
>
http://sourceforge.net/powerbar/db2/
> _______________________________________________
> Playerstage-gazebo mailing list
>
Playerstage-gazebo@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo

-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
Playerstage-gazebo mailing list
Playerstage-gazebo@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/playerstage-gazebo