The parameters used by the fglrx driver, as well as the settings made by the amdccle (ATI Catalyst Control Center), are stored in a database file named amdpcsdb (if you type "locate amdpcsdb" at a command prompt you'll see it's in the directory /etc/ati/). When you boot up, fglrx loads whatever is recorded in amdpcsdb, and so it will ignore any changes you just made manually to the xorg.conf file.
So, if you edit xorg.conf by hand, you must use the aticonfig tool to register the changes you made:
- Code: Select all
aticonfig --input=/etc/X11/xorg.conf --tls=1
You need to do this every time you make a change by hand to your xorg.conf file.
My thanks to djdoo over on the Compiz-Fusion forums for pointing this out: