Comment 8 for bug 313938

I noticed that you said that hardy works fine, does that mean that you are dual booting, both Hardy and Intrepid? I am wondering if you still have your xorg.conf file that was working fine from Hardy? If you back up your current non-working xorg.conf file and bring over the one from Hardy to intrepid, does this solve your problem?
Another thing to try would be to remove the card you plan to use as your secondary, and get the single primary card working successfully. Then re-introduce the other card.

I am not sure that this truly a bug with xorg, I am pretty sure that when you want to try and run this type of a configuration you pretty much need to manually edit your own xorg file in order to get your desired results. Meanwhile I will be looking into it a little more.

If you have access to the older xorg.conf and you try using it and it works, or if you try the other idea I presented and it does, then I think we should mark this as invalid.