ATI Mobility FireGL V5200
Linux X.Org driver
Not supported by the Xorg radeon driver
Display on the internal LCD works as long as you set the monitor settings correct. Changing the driver from "ati" to "vesa" in xorg.conf will start X but with lower resolution than expected
External VGA port
Proprietary ATI driver
Proprietary fglrx driver does not officially support this chipset but version 8.24.8 works by adding "ChipID 0x71c5" to the xorg.conf "Device" statement and fooling it into thinking it's a X1600 mobility.
Linux kernel Framebuffer driver