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|Sun Fire X4640 Server Product Notes Sun Fire X4640 Server Documentation Library|
USB ports might become disabled during operation. This appears to be a hardware problem related to the NVIDIA USB controller.
When this happens, the device attached to the USB port becomes inactive. A message similar to the following is reported in the file:
[ID 691482 kern.warning] WARNING: /pci@0,0/pci108e,cb84@2 (ohci0): Connecting device on port 1 failed