GeForce 9800 GX2 - Only one GPU reported under linux

Hi folks,

My Dual GPU 9800 GX2 has developed a problem! Under Linux only 1 GPUis
ever reported, this did not used to be the case, and has only come
apparent since installing Kubuntu 11.10.

However I have tested by re-installing Mint 11 (Where this used to
correctly report both GPU's and SLi configuration, however this too only
reports a single GPU now.

Is this a hardware issue, or has the latest Linux GeFOrce driver got an
issue? below is the result of LSPCI and nvidia-smi
Regards

Craig.

craig@AmsTech-Desktop:~$ lspci
00:00.0 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory
Controller (rev a2)
00:01.0 ISA bridge: nVidia Corporation MCP78S [GeForce 8200] LPC Bridge
(rev a2)
00:01.1 SMBus: nVidia Corporation MCP78S [GeForce 8200] SMBus (rev a1)
00:01.2 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory
Controller (rev a1)
00:01.3 Co-processor: nVidia Corporation MCP78S [GeForce 8200]
Co-Processor (rev a2)
00:01.4 RAM memory: nVidia Corporation MCP78S [GeForce 8200] Memory
Controller (rev a1)
00:02.0 USB Controller: nVidia Corporation MCP78S [GeForce 8200] OHCI
USB 1.1 Controller (rev a1)
00:02.1 USB Controller: nVidia Corporation MCP78S [GeForce 8200] EHCI
USB 2.0 Controller (rev a1)
00:04.0 USB Controller: nVidia Corporation MCP78S [GeForce 8200] OHCI
USB 1.1 Controller (rev a1)
00:04.1 USB Controller: nVidia Corporation MCP78S [GeForce 8200] EHCI
USB 2.0 Controller (rev a1)
00:06.0 IDE interface: nVidia Corporation MCP78S [GeForce 8200] IDE (rev a1)
00:07.0 Audio device: nVidia Corporation MCP72XE/MCP72P/MCP78U/MCP78S
High Definition Audio (rev a1)
00:08.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge
(rev a1)
00:09.0 IDE interface: nVidia Corporation MCP78S [GeForce 8200] SATA
Controller (non-AHCI mode) (rev a2)
00:0a.0 Ethernet controller: nVidia Corporation MCP77 Ethernet (rev a2)
00:10.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Express
Bridge (rev a1)
00:12.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Express
Bridge (rev a1)
00:13.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge
(rev a1)
00:14.0 PCI bridge: nVidia Corporation MCP78S [GeForce 8200] PCI Bridge
(rev a1)
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Link Control
01:09.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 07)
01:09.1 Input device controller: Creative Labs SB Live! Game Port (rev 07)
01:0a.0 FireWire (IEEE 1394): Agere Systems FW322/323 (rev 70)
02:00.0 PCI bridge: nVidia Corporation NF200 PCIe 2.0 switch for Quadro
Plex S4 / Tesla S870 / Tesla S1070 / Tesla S2050 (rev a2)
03:00.0 PCI bridge: nVidia Corporation NF200 PCIe 2.0 switch for Quadro
Plex S4 / Tesla S870 / Tesla S1070 / Tesla S2050 (rev a2)
03:02.0 PCI bridge: nVidia Corporation NF200 PCIe 2.0 switch for Quadro
Plex S4 / Tesla S870 / Tesla S1070 / Tesla S2050 (rev a2)
05:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800
GX2] (rev a2)
craig@AmsTech-Desktop:~$


craig@AmsTech-Desktop:~$ nvidia-smi
Gpus found in probe:
Found Gpuid 0x5000
Attaching all probed Gpus...OK
Getting unit information...OK
Getting all static information..
craig@AmsTech-Desktop:~$