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USB Details as shown by Device Manager?

  1. Feb 20, 2010 #1
    I have six usb ports in all on my system. 2 in the front and 4 at the back. Now if I go into device manager (in windows xp professional sp2) and check under "Universal Serial Bus Controller" I get the following:-

    Intel(R) 82801 EB Universal Host Controller - 24D2

    Intel(R) 82801 EB Universal Host Controller - 24D4

    Intel(R) 82801 EB Universal Host Controller - 24D7

    Intel(R) 82801 EB Universal Host Controller - 24DE

    Intel(R) 82801 EB Universal Host Controller - 24DD

    USB root hub
    USB root hub
    USB root hub
    USB root hub
    USB root hub

    Now though I have physically 6 USB ports, I just see 5 USB controllers and 5 USB root hubs. Why so? Shouldn't there be 6 of those?

    Also , when I try to insert a usb device plug into one of the usb sockets at the front of the P.C. , it says "USB Device not recognized" message .

    I hope this is clear now. Thanks for your help.

    Regards
     
  2. jcsd
  3. Feb 24, 2010 #2
    Have you tested all 6 ports? I've had a couple computers where one port wasn't working.
     
  4. Mar 16, 2010 #3
    Yeah, especially the front ones are notorious for not working with some USB devices.
     
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