USB device down after some time

  • Thread starter Thread starter haris
  • Start date Start date
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haris

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I have this usb fingger print scanner device that randomly become not
functioning after some period of time. If this happen I have to restart the
computer to make it good.

The only thing I can do now is either to restart my PC or set the PC to auto
restart at night. Both option is not good to me since I need to have the PC
running 24/7.

Can anyone give me any insight why this is happening, how to troubleshoot it
and how to fix it?

Is someone having same problem with USB device in general or specific to a
fingger print scanner?

One more thing, I've tried contacting the hardware manufacturer but they are
good at delaying solution and making my life miserable. The question is, if
I have Windows XP DDK, can I write a driver for this device without hardware
specific information (which I cannot get) from the manufacturer?. Is USB
driver programming is something generic like what we used to do with Serial
Comm devices.

That is that so far, happy hungting :)






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haris said:
One more thing, I've tried contacting the hardware manufacturer but they are
good at delaying solution and making my life miserable. The question is, if
I have Windows XP DDK, can I write a driver for this device without hardware
specific information (which I cannot get) from the manufacturer?. Is USB
driver programming is something generic like what we used to do with Serial
Comm devices.
Click to expand...

The short answer is - no way. I'd suggest to call that h/w manufacturer and tell them
you're going to evaluate a competitor's product.

What if you simply unplug and replug this thing? will it work?

--PA
 
Disable "power down the device if inactive" in its properties in the device
manager.
 
I have check in USB Controllers section and found the usb device properties.
However it doesn't have any power-down-when-inactive or similar properties.

Thanks though. Is there a way to troubleshoot a device that power down
itself but doesn't wake up when required?
 
So I found this setting and it is already set (on all available root hub) to
not power down inactive device.

Unfortunately during this several day time the problem still occurs.

I have observe this problem on another USB device (not a fingerprint
scanner). Can anyone relate to me how this can be happening? How that unplug
and plug the usb device or restarting PC can solve the problem? I'm sure
there are people here who understood how USB device function. From this we
can throw around ideas on cause of problem and the solution.

Thanks in advance
 
You may need to check in your BIOS to see what your power management
settings are. If the BIOS is set to power down devices that are not
used for a period of time, even though Windows is told not to do it, it
will still do it because the BIOS controls the OS in this case.

Also, make sure that you have the most updated chipset drivers. This
will generally help fix problems such as this. If you need help finding
out what chipset you are running, let me know what motherboard it is (if
you know) or any information you can provide on your computer. There are
also a few programs that I can recommend to find out what chipset you
have. Try Everest Home Edition from www.lavalys.com (FREE).

Nathan McNulty
 
settings are. If the BIOS is set to power down devices that are not
used for a period of time, even though Windows is told not to do it, it
will still do it because the BIOS controls the OS in this case.
Click to expand...

Is it still true for ACPI machines?
 
I'm thinking this all depends on which revision of ACPI the motherboard
supports. I know my current P4P800 (Rev. 1.4) doesn't, but my old P3 733
was an older revision that had a similar problem to this. The USB mouse
(MS Optical) would power down after a period of time because it was set
to in the BIOS, but in Windows I had told it not to do that. It did it
anyways.

Nathan McNulty
 
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