radeon, screen option

[Csillag Kristof]

>> Section "Device"
>>        Identifier      "FireMV 2200-1"
>>        BusID           "PCI:3:6:0"
>>        Screen          0
>>        Driver          "radeon"
>> EndSection
>>
>> Section "Device"
>>        Identifier      "FireMV 2200-2"
>>        BusID           "PCI:3:6:0"
>>        Screen          1
>>        Driver          "radeon"
>> EndSection
>>
>> Section "Screen"
>>        Identifier      "FireMV 2200 screen-1"
>>        Device          "FireMV 2200-1"
>> EndSection
>>
>> Section "Screen"
>>        Identifier      "FireMV 2200 screen-2"
>>        Device          "FireMV 2200-2"
>> EndSection
>>
>> Section "ServerLayout"
>>        Identifier "Test"
>>        Screen 0 "FireMV 2200 screen-1"
>> #        Screen 0 "FireMV 2200 screen-2"
>> EndSection
>>

> You need to user xinerama for all heads.  that means adding
> screen/device sections for each head and specifying the layout in the
> serverlayout section.

I was trying to do exactly that; see the xorg.conf excerpt above.

(This config is only for testing the separation of the heads to different
screen sections; I know I have to put one rightof the other, but there
is no point in doing it until I have the two screen sections working
properly.)

In fact, I have tried two approaches:

1. BusID (not shown here)

   Since the second head shows up under a different PCI sub-id in lspci,
   I tried to use that for the second device, but X says the device is
not detected.

2. Screen option (shown above)

   When enabling "FireMV 2200 screen-1" in the server layout,
   both monitors show up, when only the first one should.
   Then enabling the other one (currently commented out),
   none of the monitors activate.

Is there an error in my config file?

Thank you for your help, again:

    Kristof