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Thanks. I now suspect the local support staff messed up when my system was updated from RHEL4 to RHEL5 earlier this year. -Bob Peter W. Draper wrote: > On Thu, 27 Aug 2009, Bob Garwood wrote: > >> I've not used gaia for quite some time. My OS has gone from RedHat >> Enterprise Linux 4 to 5 and also from 32 bit to 64 bit so I >> downloaded the most recent release plus patches. When I try and run >> gaia I get: >> >> Xlib: extension "GLX" missing on display ":0.0". >> ERROR: In >> /export/data/star/starlink-nanahope/thirdparty/kitware/vtk/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, >> >> line 606 >> vtkXOpenGLRenderWindow (0x1c0dcc60): GLX not found. Aborting. >> >> From what I've been able to glean in about 15 minutes of google >> attempts is that this probably means I need to use a rebuilt video >> driver with this turned on. Further suggestions would be great. >> Thanks. > > Hi Bob, > > that's about right. If you want the best 3D performance then you need > a native driver for NVIDIA cards. I believe ATI cards are already > supported in the distributed drivers, other cards I have no idea about > I'm afraid. > > The fallback when no native GLX is available for your graphics card is > to install the Mesa package driver. That does software rendering. > > You can test if GLX is working by running the "glxgears" command (a > score of a few thousand FPS seems to be sufficient). > > Cheers, > > Peter. >