none
External USB devices lose connection

    Question

  • External USB devices lose connection after it sits idle.  The computer is left on all the time and this problem is new. OS is 64-bit.

    Toggling the power on the printer re-establishes the device but it goes away after many hours. This also happens for a memory stick.

    I have never encounter a situation like this.

    Any thoughts?
    Richard
    Saturday, April 18, 2009 3:35 PM

Answers

  • Hi,

    This forum only supports the official beta version Windows 7 beta build 7000.

    Windows 7 Unofficial Builds

    If the issue occurs in your next system (RC), we could not continue discuss in this forum.

    This issue can be caused by corrupt USB controllers. If the issue persists, you may follow the steps below to reinstall USB controller drivers.

    1. Click "Start", type in Device Manager the Search bar and press "Enter". Click Continue if necessary.
    2. In Device Manager, double click to expand "Universal Serial Bus controllers", right click on the "Host Controller", click "Uninstall" and click "OK".
    3. Repeat the step 2 to uninstall all items under "Universal Serial Bus controllers".

    Then, restart your computer and Windows Vista will reinstall all USB controllers automatically.


    Arthur Xie - MSFT
    • Marked as answer by Nick FV Thursday, June 04, 2009 11:17 AM
    Tuesday, April 21, 2009 5:28 AM

All replies

  • Open up Device Manager, and take a look at the Power Management settings for all of your USB root hubs, as well as any connected USB devices - uncheck 'allow Windows to turn off this device to save power.'

    HTH,
    Chris
    [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]
    Saturday, April 18, 2009 6:44 PM
  • Hi Chris,

    I tried your suggestion but it didn't work.

    I now suspect that the USB controller may be going bad or a USB device is failing. I will remove all the USB devices and try one by one to see if I can find a common divider.

    Thanks for the response,

     
    Richard
    Sunday, April 19, 2009 11:09 AM
  • This issue may be also caused by the ACPI of your BIOS that is not compatible with Windows 7 beta. I suggest that you upgrade the BIOS to the latest versions.

    However, the latest BIOS may be not for Windows 7 beta, but for Windows Vista or Windows XP. In this case, if the issue is not corrected by the latest BIOS, you may need to wait for the new BIOS that is designed for Windows Vista.


    Arthur Xie - MSFT
    Monday, April 20, 2009 9:08 AM
  • This issue may be also caused by the ACPI of your BIOS that is not compatible with Windows 7 beta. I suggest that you upgrade the BIOS to the latest versions.

    However, the latest BIOS may be not for Windows 7 beta, but for Windows Vista or Windows XP. In this case, if the issue is not corrected by the latest BIOS, you may need to wait for the new BIOS that is designed for Windows Vista.


    Arthur Xie - MSFT

    Hi Arthur,

    My saga continues:
    Motherboard is a Asus Commando with the latest BIOS. My problem is new, the system was working fine.
    I unistalled all the printers and disconnected every USB device. I then checked each USB access with a memory stick. Everything worked.
    In fact anythinng that doesn't require a driver works. e.g memory sticks, barcode reader etc.
    None of the printers will install, they do not see the USB controller.
    I have a USB controller coming tomorrow and I will turn off the computer's USB controllers and install the USB controller card and try again.
    Should this fail, I will reinstall another OS and see what happens.
    At least I'm not bored in my retirement :-).
    If this turns out to be a Windows 7 problem, it will be the first in months.
    I plan to do a clean install with the RC version even if an upgrade is available.
    Richard
    Monday, April 20, 2009 12:04 PM
  • I have a similar problem with 2x external hard drives.  Both are Buffalo but can only see that it's happening to one of them, but the other is really quiet anyway.

    The problem is that if I watch a DVD movie via WMC the playback seems to stutter every few mins.  Upon getting closer to it, it seems to run through a power cycle without any lights going off which of course causes some stutter in playback.

    I thought it would resolve itself, but to be honest it's going to end up killing the hard drive with constant power cycles, so hopefully the RC will get around this if a fix is known.

    Like K0rww, I've disabled any power settings on the pc for USB devices etc but still occurring.  I have an Asus P5-HDMI motherboard and has the latest version of the BIOS available.

    Sadly it makes Win7 unusable on my machine, so fortunately dual booting with Vista gets around this issue, so clearly an OS problem.  I've posted in the media part of the forum and others have reported similar issues with external devices / USB devices.
    Monday, April 20, 2009 8:08 PM
  • Hi,

    This forum only supports the official beta version Windows 7 beta build 7000.

    Windows 7 Unofficial Builds

    If the issue occurs in your next system (RC), we could not continue discuss in this forum.

    This issue can be caused by corrupt USB controllers. If the issue persists, you may follow the steps below to reinstall USB controller drivers.

    1. Click "Start", type in Device Manager the Search bar and press "Enter". Click Continue if necessary.
    2. In Device Manager, double click to expand "Universal Serial Bus controllers", right click on the "Host Controller", click "Uninstall" and click "OK".
    3. Repeat the step 2 to uninstall all items under "Universal Serial Bus controllers".

    Then, restart your computer and Windows Vista will reinstall all USB controllers automatically.


    Arthur Xie - MSFT
    • Marked as answer by Nick FV Thursday, June 04, 2009 11:17 AM
    Tuesday, April 21, 2009 5:28 AM
  • I have a similar problem with 2x external hard drives.  Both are Buffalo but can only see that it's happening to one of them, but the other is really quiet anyway.

    The problem is that if I watch a DVD movie via WMC the playback seems to stutter every few mins.  Upon getting closer to it, it seems to run through a power cycle without any lights going off which of course causes some stutter in playback.

    I thought it would resolve itself, but to be honest it's going to end up killing the hard drive with constant power cycles, so hopefully the RC will get around this if a fix is known.

    Like K0rww, I've disabled any power settings on the pc for USB devices etc but still occurring.  I have an Asus P5-HDMI motherboard and has the latest version of the BIOS available.

    Sadly it makes Win7 unusable on my machine, so fortunately dual booting with Vista gets around this issue, so clearly an OS problem.  I've posted in the media part of the forum and others have reported similar issues with external devices / USB devices.

    Hi Tony,

    Your issues are quite different. I suggest that you create a new thread to discuss.
    Arthur Xie - MSFT
    Tuesday, April 21, 2009 5:33 AM
  • I installed Vista and the system works correctly.

    I think this issue should be deleted. Windows 7 worked correctly for months before current problems occured.

    I think this is just a case of the OS getting scrabled for some reason.

    Thanks for everyones help.
    Richard
    Wednesday, April 22, 2009 1:03 PM