It is probably being caused by an interrupt conflict (http://duxcw.com/faq/irq/irq.htm) between the USB controller and a board in one of the PCI slots. USB controllers usually share and interrupt with one of more PCI slots. The motherboard manual may state which slots they are. There may be an indication of which board(s) is/are having problem by an exclamation mark in the Device Manger (Start, Settings, Control Panel, System…). Try setting O/S is Plug ‘n Prey aware or PnP is controlled by O/S in the PnP part of the CMOS Setup. That should get IRQ steering going and allow interrupt sharing. Up to four PCI devices are supposed to be able to share an interrupt. Unfortunately, it doesn’t always work well. You may have to move boards around between the various PCI slots. Try to avoid the PCI slot next to the graphics board. The AGP board usually shares it. Try freeing-up interrupts by disabling motherboard resources that are not being used (e.g., COM ports). Larry |
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RE: USB port problems, lbyard
, Apr-02-01, (1)