Hello, I've always been using Ati's proprietary drivers, fglrx. I wanted to try AIGLX with the open source drivers. Well, I can't get my ATI Mobility Radeon X1400 recognized.
Here's what i have in xorg.conf:
Section "Device"
Identifier "ATI Mobility X1400" 
Driver "radeon"
BusID "PCI:1:0:0"
Option "AccelMethod" "XAA"
Option "AGPMode" "8"
Option "GARTSize" "64"
Option "EnablePageFlip" "1"
Option "ColorTiling" "1"
Option "XAANoOffscreenPixmaps" "true"
This is what I get in Xorg.0.log:
(II) Primary Device is: PCI 01:00:0
(EE) No devices detected.
lspci -v:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X1400 (prog-if 00 [VGA])
        Subsystem: Dell Unknown device 2003
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at d0000000 (32-bit, prefetchable) [size=256M]
        I/O ports at ee00 [size=256]
        Memory at efdf0000 (32-bit, non-prefetchable) [size=64K]
        [virtual] Expansion ROM at efd00000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 2
        Capabilities: [58] Express Legacy Endpoint IRQ 0
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
I have enabled module support for radeon and drm in the kernel. I have debian sid with 2.6.20 self-compiled. What am I missing? Thanks