README.SBo for fglrx-driver Once you install this package, you should execute as root fglrx-switch -fglrx You need to add this line to /etc/fstab if it's not already there: tmpfs /dev/shm tmpfs defaults 0 0 and then mount /dev/shm as root. Finally, you need to edit /etc/X11/xorg.conf to make use of this driver. It's a good idea to read also "Configuring the X server", in the section "Setting up the 'fglrx' driver" at http://slackwiki.org/ATI_Graphics Also, if you upgrade this package(and fglrx-module) remember to unload the fglrx module(# modprobe -r fglrx) and load it again(# modprobe fglrx). If you are in an X session as a normal user or in some other desktop/wm than KDE or GNOME, you can do the following to run the ATI Catalyst Control Center: user@darkstart:~$ su root@darkstart:/home/user# xauth merge /home/user/.Xauthority root@darkstart:/home/user# export DISPLAY=:0.0 root@darkstart:/home/user# amdcccle & or: user@darkstart:~$ xhost LOCAL: user@darkstart:~$ su root@darkstart:/home/user# export DISPLAY=:0.0 root@darkstart:/home/user# amdcccle & Before you uninstall or upgrade this package, you should execute as root fglrx-switch -mesa