making port 3.0 work for usb 2.0

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  1. Posts : 9
    windows 10
       #1

    making port 3.0 work for usb 2.0


    I have got 3 usb ports in my laptop. 2 of which are specified 2.0 (let's call them Ports A and B) and remaining 1 runs usb 3.0 perfectly (Port C)
    I use USB mouse on Port A and USB keyboard on Port B. However, Port B is a bit loose, it's been used countless times, so a little shake on the keyboard wire or the laptop disconnects it and it gets bugged. I have to restart pc to fix it and reconnect usb keyboard.
    Yesterday, I went to sleep without disconnecting the usb keyboard from port 2.0. When i woke up, port was bugged but this time it was different. Restarting windows didn't fix it. When I connect the keyboard usb, it makes Connect Sound and Disconnect sound in windows repeatedly and the following "WINDOWS DIDN'T RECOGNIZE THE USB". In Device Manager it shows "Device Descriptor failed". I can say It's dead.
    I want to work around it and get my Port C (3.0) to work for my keyboard. It had never worked previously. So I went to BIOS and disabled xHCI (which apparantely controls 3.0 functions) so disabling it would make the port 2.0. I disabled it and after the windows boot. It still says Windows Doesn't Recognize this USB. It should work for my keyboard right? Should I reset the usb drivers with installation package? how do i do it (there's no option for delete driver software)?
    In Device Manager > USB... I have the following;
    2x Generic USB Hub
    Intel 8 Series USB Enhanced controller #1 9c26
    USB Composite Device
    USB Root Hub
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  2. CountMike's Avatar
    Posts : 18,352
    W10+Developer Insider + Linux
       #2

    USB3 has more contacts than USB2. When you put USB3 device into USB2 port those extra contacts just rest on insulator and are not used so they don't matter at all. So if a pot contacts are no good, there's nothing you can do about it, just have to be changed/fixed.
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  3. Posts : 9
    windows 10
    Thread Starter
       #3

    CountMike said:
    USB3 has more contacts than USB2. When you put USB3 device into USB2 port those extra contacts just rest on insulator and are not used so they don't matter at all. So if a pot contacts are no good, there's nothing you can do about it, just have to be changed/fixed.
    Thank you for your response. I am trying to put USB2 into a USB3 port just to be clear. My Port was originally not accepting USB2 devices so I went into Bios to disable xHCI option, but no change.
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  4. CountMike's Avatar
    Posts : 18,352
    W10+Developer Insider + Linux
       #4

    salukhe said:
    Thank you for your response. I am trying to put USB2 into a USB3 port just to be clear. My Port was originally not accepting USB2 devices so I went into Bios to disable xHCI option, but no change.
    It works same way around, USB2 has only 4 contacts and it will match those 4 in ISB3 port.
    This is USB3 port
    making port 3.0 work for usb 2.0-image.png
    USB2 port:
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  5. Clintlgm's Avatar
    Posts : 1,081
    Win 10 pro Upgraded from 8.1
       #5

    I would suggest you use a USB C Powered Hub adapter if your 3rd Port is indeed a C type Port, if not the just use a USB 3.0 or USB 2.0 Powered Hub this will give you several USB C and USB A connections best workaround for a damaged port. USB 3.0 and 3.1 are backward compatible to USB 2.0 as described by @CountMike in the previous post. Your setting in your BIOS/UEFI should be for Legacy USB enabled.
    If your still having issues you could delete the USB drivers in Device manager and let them reinstall that could solve your issue
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  6. Posts : 9
    windows 10
    Thread Starter
       #6

    @Clintlgm Thank you for the suggestion. I just bought a USB 2.0 powered hub since both my keyboard and mouse are 2.0. It's working and it's great as an alternative.
    As for the faulty port, Reinstalling the drivers doesn't help (I can't find Delete Driver Software) option in Uninstall tab. So it just keep reseting after windows reboot without any change and I don't know some other way to completely uninstall the drivers. I think i will have to open the laptop case and reconnect the plugs etc.
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  7. Clintlgm's Avatar
    Posts : 1,081
    Win 10 pro Upgraded from 8.1
       #7

    salukhe said:
    @Clintlgm Thank you for the suggestion. I just bought a USB 2.0 powered hub since both my keyboard and mouse are 2.0. It's working and it's great as an alternative.
    As for the faulty port, Reinstalling the drivers doesn't help (I can't find Delete Driver Software) option in Uninstall tab. So it just keep reseting after windows reboot without any change and I don't know some other way to completely uninstall the drivers. I think i will have to open the laptop case and reconnect the plugs etc.
    As to the defective USB port, its not likley that you can turn it off its most likley soldered on to your MB. I just would not plug anything into it our plug in some kind of a dummy plug to keep you from trying to use it again.

    The only drivers for USB are found in device manager making port 3.0 work for usb 2.0-usb-drivers.jpg From here you can delete the drivers but they will reinstall on the next reboot.

    What you have is a defective hardware port that there are not software points to turn it off. In fact both your USB 3.0 Ports are connected so if you somehow disconnect one you would also disconnect the 2nd port also.

    I doubt it would work the aggravation and risk of seriously damaging your notebook, of disassembling a notebook to physically disconnect a USB Port. Fill the darn thing with Silicon if it really bothers.
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  8. CountMike's Avatar
    Posts : 18,352
    W10+Developer Insider + Linux
       #8

    Clintlgm said:
    As to the defective USB port, its not likley that you can turn it off its most likley soldered on to your MB. I just would not plug anything into it our plug in some kind of a dummy plug to keep you from trying to use it again.

    The only drivers for USB are found in device manager making port 3.0 work for usb 2.0-usb-drivers.jpg From here you can delete the drivers but they will reinstall on the next reboot.

    What you have is a defective hardware port that there are not software points to turn it off. In fact both your USB 3.0 Ports are connected so if you somehow disconnect one you would also disconnect the 2nd port also.

    I doubt it would work the aggravation and risk of seriously damaging your notebook, of disassembling a notebook to physically disconnect a USB Port. Fill the darn thing with Silicon if it really bothers.
    As you can see in that first picture I posted. USB3 (physical port/connector) is two ports in one, USB3 is and top and USB2 at bottom and don't share same connectors.
      My Computers

  9. Clintlgm's Avatar
    Posts : 1,081
    Win 10 pro Upgraded from 8.1
       #9

    CountMike said:
    As you can see in that first picture I posted. USB3 (physical port/connector) is two ports in one, USB3 is and top and USB2 at bottom and don't share same connectors.
    I think we agree Mike on a MB there all in one physical connector both the built in ones on the MB itself and the extra add in are all one physical connector. I guess you could cut off the 4 USB 3.0 Pins Or figure out which wires in the bundle are for the USB 3.0.

    Most of the notebook that have all the external connection on one end of the notebooks are soldered on fittings to save space. I sure wouldn't open one up just to disconnect a dead USB Port, Maybe to replace one is that were possible. But I would probably wait until I needed to repaste the CPU and or GPU or had to replace a fan or something critical.
      My Computers

  10. CountMike's Avatar
    Posts : 18,352
    W10+Developer Insider + Linux
       #10

    Clintlgm said:
    I think we agree Mike on a MB there all in one physical connector both the built in ones on the MB itself and the extra add in are all one physical connector. I guess you could cut off the 4 USB 3.0 Pins Or figure out which wires in the bundle are for the USB 3.0.

    Most of the notebook that have all the external connection on one end of the notebooks are soldered on fittings to save space. I sure wouldn't open one up just to disconnect a dead USB Port, Maybe to replace one is that were possible. But I would probably wait until I needed to repaste the CPU and or GPU or had to replace a fan or something critical.
    Yeah, I hate opening laptops, right now I had to practically disassemble my GF's Esprimo just to change CMOS battery. Dozens of screws.
      My Computers


 
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