How to check :
# uname -a
# lspci
# lspci -n
# lsmod
# dmesg | grep drm
# dmesg | grep radeon
# dmesg | grep agp
# X -version
# grep EE /var/log/XFree86.0.log
# glxinfo | head
@TaG: HardWare ID Debian PCI
