Thanks for the prompt reply. My comments are below.


Pekka Paalanen wrote:
>> 0005:01:00.0 VGA compatible controller: nVidia Corporation NV44 [GeForce 
>> 6200 LE] (rev a1) (prog-if 00 [VGA controller])
>>     
>
> Hmm, note the bus id.
>   

I actually did, but I have no idea how to interpret this. x86 linux show 
only 3 numbers for every device, but this server has 6 PCI roots with 
separate bus numbering so if we want to use 3 numbers system, the bus-id 
needs to be fixed somehow...

>> [root@localhost ~]# ls -la /dev/fb*
>> crw------- 1 root root 29, 0 2009-02-13 10:19 /dev/fb
>>     
>
> This is offb, right? If it is nvidiafb, you need to use... can't recall,
> see here: http://nouveau.freedesktop.org/wiki/Kernel_Framebuffer_Driver
>
> The device you should get from nouveau DRM is /dev/dri/card0.
Note this place. I'll ask later :)
>
>> (II) Primary Device is: PCI 01@05:00:0
>>     
>
> Above it says bus id (5@1:0:0) and here 01@05:00:0...
> could that be the problem?
>
>   
I'd like anybody to tell what do they write (or see after auto-config) 
as PCI-id for their videos on ppc. I think that it might be a problem.

>> Section "Device"
>>         Driver      "nouveau"
>>         VendorName  "nVidia Corporation"
>>         BoardName   "NV44 [GeForce 6200 LE]"
>>         BusID       "PCI:1:0:0"
>>     
>
> And this is a third bus id, different from the two above?
> It's confusing at least. Try without any BusID in config?
>   

For example? What string would at least look correct? I did try a lot of 
them but to no avail.
>> 3. what am I doing wrong in my expirements? I can see 4 types of drivers:
>> - original drivers coming with the fedora10 kernel (I got rid of them 
>> before started playing with nouveau because they did not create even 
>> /dev/fb*);
>>     
>
> That's the kernel framebuffer driver device, which is usually harmful
> to accelerated X.org drivers, but since you have ppc, you probably
> need something. The offb driver in kernel should work.
>   


Is /dev/dri/card0 the only device node needed for X? Do not we need /dev/fb(0) as well? Or we need both, do we?


>> - drm drivers (which are replacement for the original onesm right?)
>>     
> Original what?
>   
Original I meant is the .ko which appears after compiling the Linux 
kernel with the nVidia driver enabled as a module.
My point was that there can be only it OR drm driver loaded. At least, 
the original drriver does not start (and does not create /dev/fb - I am 
not sure tha it has to, but anyway) because it fails on reading the 
nVidia registers in the very beginning (while executing its _probe) - 
all the memory space mapped via PCI BAR0 is empty.

> DRM modules are the kernel part of the Nouveau driver. Without them you
> don't get any acceleration. These are not kernel framebuffer drivers (yet,
> at least).
>   

But is the original (from the linux kernel tree) driver required to make 
things working at all?

>> - x.org drivers (which I've not changed/replaced)
>>     
>
> nouveau_drv.so, required, from git.
>   

It is accessed via /dev/dri/card0, right?

>> - mesa drivers - what is their role - I still do not understand.
>>     
>
> 3D acceleration. Not in any usable state at this time, and not
> included in any Mesa release yet. You can just forget it and enjoy
> software OpenGL rendering.
>   

Cool! There are already too many things so excluding any of them is 
helpful :-)

Actually I start thinking that I need to look for the linux capable to 
start with X on PlayStation3. It can have clues...