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USB Card

Trish's Escape from Hardware Hell Help Board » Hardware » Audio and Input Devices (mouse, keyboard, joystick, etc.) » USB Card « Previous Next »

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Posted on Friday, December 29, 2000 - 5:34 pm:   

I recently bought a PCI Card to add USB ports to my computer. Windows detcted the card and installed two devices:
OPTi 82C861 PCI to USB Open Host controller
USB Root Hub
which was what is was supposed to do, however the USB Root Hub is not working correctly. Under device status it says:
"Due to hub transfer request failures, a hub has
been disabled. Check your computer's cabling
and devices, then restart your computer"
I can't find anything wrong with the USB Root Hub, however the Controller's IRQ is 10, the same as my video card(3dfx Voodoo3 in case it matters)and two 'IRQ Holders for PCI Steering'. I'm not sure if this could be the source of the problem, however i have no other ideas, I also don't know how to go about changing the IRQ's as I cannot change them for either the video card or the Controller. What should i do to fix this?

Thanks in advance for any help...unless no one responds, in which case I have no one to thank :)
Posted on Sunday, December 31, 2000 - 10:42 pm:   

The conflict with the video IRQ is very likely the problem. You can try finding a free IRQ and assigning that one to the USB card manually. Then reboot and see if it "takes". Finding a free IRQ is often difficult though. You may have to disable one of your serial (COM) ports in order to free up an IRQ (COM1=IRQ4, COM2=IRQ3)). If you are using a serial mouse, DON'T disable COM1!

If that fails, try uninstalling the USB card from device manager and see if it will auto-install to the IRQ you freed up.

As a last resort, I have often found that a fresh install of Windows will often solve IRQ conflicts...

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