So I finally got my 6990 setup running correctly under Ubuntu 11.04. Been doing some testing with the various settings, and so far with a single core running I'm able to hit just over 400MH/s. However, as soon as I enable the second core, both drop to more in the 340MH/s range. Is this to be expected with a dual GPU card like this? Are there any settings you'd suggest modifying to see if it makes a difference?

I've been following mostly Inaba's guide at http://forum.bitcoin.org/?topic=7514.0, but using the 2.4 SDK. I am also using the 11.5 version of the ATI driver. However, I am unable to get either clinfo or poclbm to detect the card. lspci, fglrxinfo, aticonfig --lsa all seem to see the card correctly. I've done plenty of searching and looked through all the guides I can find, but so far no solution that has worked. Any suggestions to get this running would be greatly appreciated.

lspci -v :
03:00.0 VGA compatible controller: ATI Technologies Inc Device 671d (prog-if 00 [VGA controller])
        Subsystem: ATI Technologies Inc Device 0b2a
        Flags: bus master, fast devsel, latency 0, IRQ 50
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        Memory at e5000000 (64-bit, non-prefetchable) [size=128K]
        I/O ports at 9000 [size=256]
        [virtual] Expansion ROM at e4000000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 3
        Capabilities: [58] Express Legacy Endpoint, MSI 00
        Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
        Capabilities: [150] Advanced Error Reporting
        Kernel driver in use: fglrx_pci
        Kernel modules: fglrx


04:00.0 Display controller: ATI Technologies Inc Device 671d
        Subsystem: ATI Technologies Inc Device 1b2a
        Flags: bus master, fast devsel, latency 0, IRQ 51
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Memory at e7000000 (64-bit, non-prefetchable) [size=128K]
        I/O ports at a000 [size=256]
        [virtual] Expansion ROM at e6000000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 3
        Capabilities: [58] Express Legacy Endpoint, MSI 00
        Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
        Capabilities: [150] Advanced Error Reporting
        Kernel driver in use: fglrx_pci
        Kernel modules: fglrx

fglrxinfo:

display: :0.0  screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon HD 6990
OpenGL version string: 4.1.10750 Compatibility Profile Context



display: :0.0  screen: 1
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon HD 6990
OpenGL version string: 4.1.10750 Compatibility Profile Context

aticonfig --lsa:

* 0. 03:00.0 AMD Radeon HD 6990
  1. 04:00.0 AMD Radeon HD 6990

* - Default adapter

clinfo:
Number of platforms:                             1
  Platform Profile:                              FULL_PROFILE
  Platform Version:                              OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
  Platform Name:                                 AMD Accelerated Parallel Processing
  Platform Vendor:                               Advanced Micro Devices, Inc.
  Platform Extensions:                           cl_khr_icd cl_amd_event_callback cl_amd_offline_devices


  Platform Name:                                 AMD Accelerated Parallel Processing
Number of devices:                               1
  Device Type:                                   CL_DEVICE_TYPE_CPU
...

poclbm.py:

No protocol specified
No device specified or device not found, use -d to specify one of the following

•      Intel(R) Celeron(R) CPU          430  @ 1.80GHz