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General discussion

usb bus problems

by VANMAN Mar 22, 2004 3:11AM PST

I have a problem with a 4 port usb bus. when first plugged in it is detected by found new hardware. then driver is found and it then works fine. I run a scanner and a smart card reader through it. all is fine till I shut down computer. when I reboot. usb bus is not recognised. and if I uninstall bus. and reinstall. I get message that driver for device not specified. and it no longer works. if I unplug from computer. then plug it in again all works fine. till I shut down again. when problem begins again when I reboot. could it be faulty usb hub. or software fault. any advise on how to solve this much appreaciated

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Re:usb bus problems

by r. proffitt Forum moderator Mar 22, 2004 6:32AM PST

A checklist.

1. BIOS uptodate.
2. Motherboard drivers uptodate (Microsoft doesn't do this.)
3. Test with another hub.
4. Try a powered hub.

Read http://www.usbman.com MANY tips and tricks, but they vary with the chipset.

Bob

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