Ati FireMV 2400 PCI card

[Erwin Rol]

On Sat, 2007-03-10 at 01:39 +0100, Erwin Rol wrote:

> Now i made two xorg.conf files, one xorg.conf.0 with the device entry
> for head 1&2 (the first M9) and one xorg.conf.1 with the device entry
> for head 3&4 (the second M9).
> 
> I wanted to try if they work separately and to my surprise head 3&4
> worked when run on their own. So the card/chip was initialized
> correctly. After that i tried;
> 
> Xorg :0 vt07 -config xorg.conf.0 &
> Xorg :1 vt07 -config xorg.conf.1 &
> 
> And to my even bigger surprise that worked two. I got a all 4 screens
> working. The mouse of course is in kind of clone mode, but i can start
> applications and direct them to :0.0 or :1.0 and they shop up on the
> correct monitors.

It seems that what i said there was partly incorrect, I can start two X
servers but the order has to be first 1 then 0. If i do it the other way
around the start of the second X server will hang my machine. Putting
the two configs in one file will hang the machine no matter what order
the chips are initialized. So i first need to start, and wait until the
screen is there, the server that uses the  Option "BiosLocation"
"primary:0xc000" line, and than the one that doesn't. If i do it like
that i get two working X server with 4 monitors in total with DRI
working. 

The question is why does it hang when the order is not exactly like
that ? Could it be that the Option "BiosLocation"
"primary:0xc000" causes the full card to be reset, and so this has the
be done first?  Any ideas on how to debug this? 

- Erwin