BrainVISA

Hi all,

We've got 3 brand new Dell machines with NVidia graphic cards, with Fedora Core 6 installed.

Anatomist is unable to display meshes correctly: we've got something completely ugly in the windows, and the following message in the terminal
GL_ARB_shadow present
GL_SGIX_shadow present
GL_SGIX_depth_texture extension present
GL_ARB_depth_texture extension present
GL_ARB_texture_cube_map extension present
GL_EXT_texture_cube_map extension not available

We've changed the /etc/X11/xorg.conf to add things such as
Load "GLcore"
Load "glx"
Load "extmode"

We've run "yum update" to be sure we had the last driver release for the graphic card (hopefully).

Nothing changes...

glxinfo gives some indications such as:
direct rendering: No
OpenGL renderer string: Mesa GLX Indirect

BTW, I have the same problem on my own quite old computer, which has an ATI Radeon Card, everything was OK with Anatomist when I had FC5 installed, and I've got the same display bug since I've updated to FC6

Any idea would be much appreciated

Melanie

Hi Mélanie,

It seems you are just not using the nvidia driver at all...
Check in xorg.conf, in section "Device" the Driver param: you should specify "nvidia" and not "nv" or "vesa" (nv is the basic driver shipped with Xorg, not the driver made by nvidia).

Alternately on Fedora distribs, you can use the RPM driver from freshrpms.net, then it will update the xorg.conf file and yum may update it when needed, it's very convenient.

Denis

Thanks, installing the new drivers from freshrpms completely solved the problem on the PC with Nvidia cards.

On my own PC (runnig FC6), I have and ATI Radeon card, I installed the drivers from freshrpms and I can now display meshes correctly. However, I still get the following message from Anatomist :

GL_ARB_shadow extension not available
GL_SGIX_shadow extension not available
GL_SGIX_depth_texture extension not available
GL_ARB_depth_texture extension not available
GL_ARB_texture_cube_map extension present
GL_EXT_texture_cube_map extension not available

Can I do something to solve this ?

Hi Mélanie,

Don't worry, these extensions are not necessary, it is just a detection of availability of some OpenGL extensions which may be used in future anatomist extensions (in a work started many years ago and never finished...). None of them are used by now...

Denis

OK, so I just stop worrying.

Thanks again for your help