Howdy,
I've got a dual video card rig using an ATI 5770 and 2600 together. I've got perfect performance with them driving 4 monitors in both Windows 7 and OSX 10.6.5. However, I've had a horrific time trying to get these going in Ubuntu 10.04 and 10.10.

I've used the latest ATI drivers, to date the latest of which has been Catalyist 10.11.

All the while I've had the same basic woe. I can get the 2600 running alright, but with the Catalyist configuration GUI, it identifies the 5770 as an "unidentified device". I get it to enable it anyway and it'll work but only in like 800x600 resolutions and only with mirroring. In all cases I don't seem to really get the fglrx driver going as I have no direct rendering for OpenGL.

Suffice to say this problem has kept me out of my preferred environment of Ubuntu for quite some time and thus all the pandas are crying.

Any tips/suggestions would be appreciated. Please!