[arch-general] ati mobility radeon x2300

I have an hp laptop with a m64-s. I can't get X output. I've tried catalyst proprietary but I found out that my gpu isn't supported since long time ago. so I try to setup with opensource drivers. also if i don't "nomodeset" on boot, the pc is hungs on boot. when i startx with the radeon mod loaded I get: Screen 0 deleted because of no matching config section. and then no screens found