Section "Device" Identifier "devname" Driver "radeon" ... EndSection
The driver auto-detects all device information necessary to initialize the card. However, if you have problems with auto-detection, you can specify:
VideoRam - in kilobytes
MemBase - physical address of the linear framebuffer
IOBase - physical address of the MMIO registers
ChipID - PCI DEVICE ID
In addition, the following driver Options are supported:
0 -- disable
1 -- auto-detect (default)
2 -- force on
3 -- auto-detect + 2nd head overlay
4 -- force on + 2nd head overlay
others -- auto-detect
disable means only one CRTC is used for both heads. auto-detect means the secondary head will be driven by CRTC2 if a monitor is detected there. force on means the secondary head will be driven by CRTC2 even no monitor is detected there. 2nd-head overlay means the only hardware overlay will be placed to the secondary head.
Primary/Secondary head for
dual-head cards:
(when only one port is used, it will be treated as the primary regardless)
Primary head:
DVI port on DVI+VGA cards
LCD output on laptops
Internal TMDS prot on DVI+DVI cards
Secondary head:
VGA port on DVI+VGA cards
VGA port on laptops
External TMDS port on DVI+DVI cards
Authors include: ...