ubuntu doesn´t recognize second 6990 gpus

[chrnit]

Hello everyone

I am running two crossfired 6990s in my rig. My problem is that poclbm.py does not recognize the two gpus on the second card. i read that there are devices that pretend to be a connected monitor but i think that is only needed for win7. how can i solve that problem in ubuntu?

Regards

edit: running sdk 2.4

[chrnit]

seems that one card is broken. thanks for the help, much appreciated.