USB Problem

  • Thread starter Thread starter Rational Philosopher
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Rational Philosopher

Set Up: Windows 2000; 4 port self powered USB hub from one of two PC
USB sockets, other PC socket vacant; external USB CD burner and USB
WiFi dongle into hub...

Problem: Computer spontaneously loses all USB devices including the
hub after varying periods of time {can be seconds, can be hours} USB
device unplugged warning appears on screen when it does: 'unsafe
removal of device, you have unplugged or ejected a device without
stopping it'...

Provided I dont acknowledge that warning the devices are usually
refound by the computer spontaneously after varying periods of time;
if rebooted usually the devices are refound but sometimes not...

Device manager USB controllers entries before loss: Generic USB hub -
Intel 82371 AB/EB PCI to USB universal host controller - USB mass
storage device - USB root hub...

Device manager USB controllers entries after loss: Intel 82371 AB/EB
PCI to USB universal host controller - ! USB device - USB root hub...

Does anybody have any ideas as to what might be going on here, and if
so any suggestions as to what might rectify the problem...

Many Thanks.
 
Rational Philosopher said:
Set Up: Windows 2000; 4 port self powered USB hub from one of two PC
USB sockets, other PC socket vacant; external USB CD burner and USB
WiFi dongle into hub...

Problem: Computer spontaneously loses all USB devices including the
hub after varying periods of time {can be seconds, can be hours} USB
device unplugged warning appears on screen when it does: 'unsafe
removal of device, you have unplugged or ejected a device without
stopping it'...

Provided I dont acknowledge that warning the devices are usually
refound by the computer spontaneously after varying periods of time;
if rebooted usually the devices are refound but sometimes not...

Device manager USB controllers entries before loss: Generic USB hub -
Intel 82371 AB/EB PCI to USB universal host controller - USB mass
storage device - USB root hub...

Device manager USB controllers entries after loss: Intel 82371 AB/EB
PCI to USB universal host controller - ! USB device - USB root hub...

Does anybody have any ideas as to what might be going on here, and if
so any suggestions as to what might rectify the problem...

Many Thanks.
Click to expand...
Sounds like your hub is loosing the external hard drive. Try another hub.
 
I don't remember, does Win2000 handle USB without problems?

This would be just something to try, but you might go into the bios and set
the "PnP OS installed" setting to no. Run it that way for a while to see if
it is any different.

Clark
 
Set Up: Windows 2000; 4 port self powered USB hub from one of two PC
USB sockets, other PC socket vacant; external USB CD burner and USB
WiFi dongle into hub...

Problem: Computer spontaneously loses all USB devices including the
hub after varying periods of time {can be seconds, can be hours} USB
device unplugged warning appears on screen when it does: 'unsafe
removal of device, you have unplugged or ejected a device without
stopping it'...

Provided I dont acknowledge that warning the devices are usually
refound by the computer spontaneously after varying periods of time;
if rebooted usually the devices are refound but sometimes not...

Device manager USB controllers entries before loss: Generic USB hub -
Intel 82371 AB/EB PCI to USB universal host controller - USB mass
storage device - USB root hub...

Device manager USB controllers entries after loss: Intel 82371 AB/EB
PCI to USB universal host controller - ! USB device - USB root hub...

Does anybody have any ideas as to what might be going on here, and if
so any suggestions as to what might rectify the problem...

Many Thanks.
Click to expand...


What is the power rating of the supply for the hub? Perhaps
it has insufficient voltage (or current, if a fold-back or
unregulated design)? If you have a multimeter you might
measure the voltage, or try another hub.

That's a fairly old motherboard, did you upgrade the bios at
any point? Point being, it might have some USB issues and
it's worth checking on whether a newer bios resolves them.
 
Clark said:
I don't remember, does Win2000 handle USB without problems?

This would be just something to try, but you might go into the bios and set
the "PnP OS installed" setting to no. Run it that way for a while to see if
it is any different.

Clark
Click to expand...

Many thanks for that idea Clark, I will try it and report back...
 
What is the power rating of the supply for the hub? Perhaps
it has insufficient voltage (or current, if a fold-back or
unregulated design)? If you have a multimeter you might
measure the voltage, or try another hub.

< Thats a good thought, I can try a higher rated supply to the hub; if
the hub drew more power than could be supplied then it possibly would
draw from the PC USB slot and maybe overload that too...

That's a fairly old motherboard, did you upgrade the bios at
any point? Point being, it might have some USB issues and
it's worth checking on whether a newer bios resolves them.

< BIOS already occurred to me, I do have the latest BIOS and I even
flashed back to an earlier version just in case there was a problem
with the later version - No go.
 
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