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jackiecamden
1 Copper

E6420 Not recognizing USBs when on a docking station

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New Dell 6420 Running Windows 7 32-bit-- while connected to the docking station, it does not recognize the USB ports. Ive connected my USB mouse into each usb port and recieve nothing. I connect it to the port on the laptop itself, while docked, and its recognized. My initial thought was bad docking station, tried a different one (both are new) with the same result. I actually ended up trying 4 all together during my whole process. Ive done the whole reboot, powercyle on and off the docking station with same result. I tested the usb ports while docked in the bios-- the mouse is recognized in all ports. This is while the laptop is docked, in the bios settings. So i figured Windows issue, maybe a bad installation.. i started Windows and now all but 2 usb ports on the docking station (or the port replicator i should say) are detecting the usb mouse and other usb devices. I also checked device manager (while docked and undocked) the only thing amiss is an unknown device under usb devices (this unknown device stays there while docked and undocked).  Any suggestions on what may be going on and what i should do fix this... im tryin to stay away from doing a complete re-install.

Thanks.

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mbay25
1 Copper

RE: E6420 Not recognizing USBs when on a docking station

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DISCLAIMER: THIS MAY NOT SOLVE YOUR PROBLEM (but there's an equal chance it will so I would try it if I were you)

Hi,

I just started a new job and had the same problem. I fixed it as follows:

Go to Computer

Go to System Properties

Go to Device Manager

You should see section after "Network Adapters" full of "Unknown Devices" for me there were two of them and two other devices with unrecognized names.

Right Click on each of these starting from the first on and select "Update Driver Software..."

Select "Search Automatically"

After I updated all these drivers and plugged the nano receiver for my wireless keyboard and mouse into the dock the computer finally recognized it and let me use the keyboard and mouse, I'm using it as I type this message 🙂

I hate seeing these tickets up on sites for years without anyone responding to them it's really frustrating and not a good sign for a manufacturer/vendor like Dell. Hope everyone who comes to this forum with this problem gets it resolved.

Best,

Mike

 

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15 Replies
mecost
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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Did anyone find a resolution to this problem? I am having a similar issue, and swapped out the laptop with a simalar one and it worked! This is definately a laptop issue and not a docking station issue.

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mikecastle
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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All,

I would also kindly request the community if anyone has found a solution.  Exact same issue.  E6420 (running Windows 7), and USB ports on laptop work (always), but USB ports on replicator/docking station do not.  

From previous post and other threads - it sounds like a laptop config issue, but I have absolutely no idea where to start/look!

Thanks so much!

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faizalenu
3 Argentium

Re: E6420 Not recognizing USBs when on a docking station

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while in the docking station, see if deletign and rescanning the root hubs work....

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faizalenu
3 Argentium

Re: E6420 Not recognizing USBs when on a docking station

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Also, dumb question -- do the other devices (NIC, video, etc) work on the port replicator.

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mikecastle
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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All other devices work, just USB ports not working... weird...

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mikecastle
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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Thanks for the suggestion Faizalenu...   whilst having the laptop docked, rescanning seemed to do the trick.  Not sure if I wasn't patient enough - but just rescanning at first didn't work.  plugged in a second mouse, rescanned and seemed to "recognize" the dock ports.

Again - odd, but appreciate the suggestion!

Thanks!

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mikecastle
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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(second mouse plugged into dock USB port)

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lsantinsuarez
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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I have a Dell E6420 running windows 7 64 bits with no problem while connected to docking station (e-port) but all the USB controller goes crazy when I connect to the docking the USB hub from a Dell monitor, new hardware is detectted and I need to restart. After that the system works well until Windows finish the load after logon, at this moment they recognize the USB Root Hub and assign it a driver and the USB's goes deactivate (complete loss of power, no keyboard leds nor mouse laser) and the system doesn't recognize the GPU (Intel + Nvidia).

These situation repeats every time that i restart, the only solution was restore an image previous the problem.

Tomorrow I will call to Dell support to ask about it.

Regards, Luis.

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lsantinsuarez
1 Copper

Re: E6420 Not recognizing USBs when on a docking station

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My problem was solved when I disable one of the two USB Root Hub from the Device Manager and refresh the list allowing the system to recognize the connected devices. After completion restart the system and enable the second USB Root Hub and the system will be stable.

If you need, you can download the lastesr drivers from en.community.dell.com/.../2183.latitude-e6420-windows-7-driver-cab.aspx

Good luck 😉

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