* 0. 01:00.0 ATI Radeon HD 5800 Series
1. 02:00.0 ATI Radeon HD 5800 Series
* - Default adapter
Adapter 0 - ATI Radeon HD 5800 Series
Core (MHz) Memory (MHz)
Current Clocks : 157 300
Current Peak : 725 1000
Configurable Peak Range : [550-775] [900-1125]
GPU load : 0%
ERROR - Get clocks failed for Adapter 1 - ATI Radeon HD 5800 Series
poclbm only sees one card that it is able to use too. Both cards are seen correctly in lscpi:
01:00.1 Audio device: ATI Technologies Inc Cypress HDMI Audio [Radeon HD 5800 Series]
02:00.0 VGA compatible controller: ATI Technologies Inc Cypress [Radeon HD 5800 Series]
02:00.1 Audio device: ATI Technologies Inc Cypress HDMI Audio [Radeon HD 5800 Series]
EDIT: Looking at Xorg.0.log I find the following:
....
[ 9.590] (WW) fglrx: No matching Device section for instance (BusID PCI:0@2:0:0) found
Which seems like a likely culprit for the problem - though as far as I can can tell, I do have such a device section in my xorg.conf (linked above).