mysterymeat@desktop:~/cgminer-2.10.5$ sudo aticonfig --lsa
* 0. 01:00.0 ATI Radeon HD 5800 Series
1. 04:00.0 ATI Radeon HD 5800 Series
2. 05:00.0 ATI Radeon HD 5800 Series
3. 06:00.0 ATI Radeon HD 5800 Series
* - Default adapter
mysterymeat@desktop:~/cgminer-2.10.5$ sudo ./cgminer -n
[2013-04-04 22:07:24] CL Platform 0 vendor: Advanced Micro Devices, Inc.
[2013-04-04 22:07:24] CL Platform 0 name: AMD Accelerated Parallel Processing
[2013-04-04 22:07:24] CL Platform 0 version: OpenCL 1.2 AMD-APP (938.2)
[2013-04-04 22:07:24] Error -1: Getting Device IDs (num)
[2013-04-04 22:07:24] clDevicesNum returned error, no GPUs usable
[2013-04-04 22:07:24] 0 GPU devices max detected