Error running rviz: Xlib: extension "NV-GLX" missing on display ":0.0"

edit

I cannot get rviz to start. I did

rosdep install rviz
rosmake rviz

They both run fine; when I run

rosrun rviz rviz

I get the following error (it tries 100x and gives me the same error that many times):

rviz::RenderSystem: error creating render window: std::exception
Xlib:  extension "NV-GLX" missing on display ":0.0".
[ WARN] [1359884146.909768203]: OGRE EXCEPTION(3:RenderingAPIException): Unable to create a suitable GLXContext in GLXContext::GLXContext at /build/buildd/ogre-1.7.4/RenderSystems/GL/src/GLX/OgreGLXContext.cpp (line 61)
rviz::RenderSystem: error creating render window: std::exception
[ERROR] [1359884146.909883164]: Unable to create the rendering window after 100 tries.
rviz: /tmp/buildd/ros-groovy-rviz-1.9.20-0quantal-20130126-0146/src/rviz/ogre_helpers/render_system.cpp:272: Ogre::RenderWindow* rviz::RenderSystem::makeRenderWindow(intptr_t, unsigned int, unsigned int): Assertion `false' failed.
Aborted (core dumped)

My system: Ubuntu 12.10 32b, GeForce GT 630M, ROS Groovy.

I am going to update this post with other info as described in http://www.ros.org/wiki/rviz/Troubleshooting#How_to_make_a_usable_bug_report, unless someone recognizes this problem right away.

EDIT: Following the instructions in this answer http://answers.ros.org/question/10588/rviz-does-not-start-prints-glxunsupportedprivaterequest/?answer=15671#post-id-15671 got rid of the previous errors, now the rviz window opens up for a second and then crashes. I am getting:

[ INFO] [1359888641.886868366]: rviz version 1.9.20
[ INFO] [1359888641.887071444]: compiled against OGRE version 1.7.4 (Cthugha)
[ WARN] [1359888644.497027605]: OGRE EXCEPTION(7:InternalErrorException): Cannot compile GLSL high-level shader : rviz/pass_pos_color.vert Cannot compile GLSL high-level shader : rviz/pass_pos_color.vert 0:1(15): preprocessor error: syntax error, unexpected IDENTIFIER, expecting NEWLINE
 in GLSLProgram::compile at /build/buildd/ogre-1.7.4/RenderSystems/GL/src/GLSL/src/OgreGLSLExtSupport.cpp (line 65)
Segmentation fault (core dumped)

EDIT 2: Same as before, tried it a couple more times, now rviz window appears. No idea why.