I tried to install ATI drivers $sudo ati-driver-installer-8.36.5-x86.x86_64.run and then executing the aticonfig $sudo aticonfig --initial but it return Abort (core dumped) after some other things if I try $LIBGL_DEBUG=verbose fglrxinfo I'll get libGL: XF86DRIGetClientDriverName: 5.2.0 r300 (screen 0) libGL: OpenDriver: trying /usr/lib32/dri/r300_dri.so libGL error: dlopen /usr/lib32/dri/r300_dri.so failed (/usr/lib32/dri/r300_dri.so: wrong ELF class: ELFCLASS32) libGL: OpenDriver: trying /usr/lib64/dri/r300_dri.so libGL error: dlopen /usr/lib64/dri/r300_dri.so failed (/usr/lib64/dri/r300_dri.so: undefined symbol: _glapi_get_dispatch) libGL error: unable to find driver: r300_dri.so libGL: XF86DRIGetClientDriverName: 5.2.0 r300 (screen 0) libGL: OpenDriver: trying /usr/lib32/dri/r300_dri.so libGL error: dlopen /usr/lib32/dri/r300_dri.so failed (/usr/lib32/dri/r300_dri.so: wrong ELF class: ELFCLASS32) libGL: OpenDriver: trying /usr/lib64/dri/r300_dri.so libGL error: dlopen /usr/lib64/dri/r300_dri.so failed (/usr/lib64/dri/r300_dri.so: undefined symbol: _glapi_get_dispatch) libGL error: unable to find driver: r300_dri.so display: :0.0 screen: 0 OpenGL vendor string: Tungsten Graphics, Inc. OpenGL renderer string: Mesa DRI R300 20060815 TCL OpenGL version string: 1.2 (1.3 Mesa 6.5.1) So I'dont know what to do I don't know what a signature is

Download Automatix for 6.10 and use that to install the driver - it's so much easier.