What is your hardware / software / driver combination?
(1) PowerColor AX6870x2
Centos 6.4 (2.6.32-358.2.1.el6.x86_64)
fglrx64_p_i_c.x86_64 (8.951-1)
AMD-APP-SDK-v2.4-lnx64
Does it work as expected?
Working and stable under cgminer.
[P]ool management [G]PU management [S]ettings [D]isplay options [Q]uit
GPU 0: 90.0C 5977859RPM | 252.7M/244.7Mh/s | A:5022 R: 5 HW:0 U:3.41/m I: 4
GPU 1: 102.0C 100% | 280.1M/271.8Mh/s | A:5583 R:15 HW:0 U:3.79/m I: 4
Unfortunately the OS refuses to recognize a second card so I'm limited to one card per machine. I cannot get Centos 6.4 to recognize two cards under lspci and so opengl refuses to seem them as well.
$ lspci -nn | grep VGA
0a:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Barts XT [Radeon HD 6800 Series] [1002:6738]
It should look like this:
$ lspci -nn | grep VGA
06:00.0 VGA compatible controller [0300]: ATI Technologies Inc Barts XT [ATI Radeon HD 6800 Series] [1002:6738]
0e:00.0 VGA compatible controller [0300]: ATI Technologies Inc Barts XT [ATI Radeon HD 6800 Series] [1002:6738]
I realized after some screwing around that my problem was created when I tried to compile the custom fglrx kernel. I didn't have developement packages and so I had problems from the start. Here's my
solution.