Hi Michel,
If they are installed, are there other possible failures that prevent 3d acceleration from working correctly?Yes. The output of LIBGL_DEBUG=verbose fglrxinfo should indicate what's wrong.
Your answers are great :-) for I have following output and 3d does not work: -----%<----- tobias at tuxbox:~$ LIBGL_DEBUG=verbose fglrxinfo libGL: XF86DRIGetClientDriverName: 8.19.10 fglrx (screen 0) libGL: OpenDriver: trying /usr/X11R6/lib/modules/dri/fglrx_dri.so libGL error: dlopen /usr/X11R6/lib/modules/dri/fglrx_dri.so failed (libstdc++.so.5: cannot open shared object file: No such file or directory) libGL error: unable to find driver: fglrx_dri.so libGL: XF86DRIGetClientDriverName: 8.19.10 fglrx (screen 0) libGL: OpenDriver: trying /usr/X11R6/lib/modules/dri/fglrx_dri.so libGL error: dlopen /usr/X11R6/lib/modules/dri/fglrx_dri.so failed (libstdc++.so.5: cannot open shared object file: No such file or directory) libGL error: unable to find driver: fglrx_dri.so display: :0.0 screen: 0 OpenGL vendor string: Mesa project: www.mesa3d.org OpenGL renderer string: Mesa GLX Indirect OpenGL version string: 1.2 (1.5 Mesa 6.2.1) -----%<----- I'll google for that failure and hope to solve it, maybe you have an idea? Greetings, Tobias