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.