intel 845G multiple monitors

[Jim Cornette]

Andrew Matthews wrote:
> i have 3 video cards, 1 intergrated intel 845, 1 pci nvida, 1 pci
> radeon... both the pci cards work but the intel display shows a crazy
> corupt screen and X ignores it, and the other two monitors work
> perfectly.
> 
> and when i try to reboot it won't because the intel 845 basicly
> freezes the system on a refresh.
> 
> But if i run it with only the intel in the config it works just fine.
> Otherwise it shows a really really bad output on the screen. And it's
> not a resolution problem.
> 
> Any Suggestions?
> 

I have seen this  effect using an 815 card. I believe the memory ranges 
used for the intel, ati and radeon overlap when using dual configuration 
mode.

I have not seen any help with this problem to date. There are a limited 
amount of display drivers, maybe selecting memory ranges for the cards 
that do not overlap other cards memory allocation can be developed.

Jim