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Hi there I just brought a mikomi gp-311a 4 port usb hub for my aspire 5315 laptop (1gb). After root hub installed sucessfully,i added my other usb devices into the hub and it is not regonising any of my devices. eg printer, lightscribe drive and memory sticks. Appreciate any help given as im at a loss why this could be happening as i also have a another 4 port hub that is only a 1.1, that i brought from a pound shop and if i add all my devices into that hub and into laptop everything works fine.

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The problem is that some usb hub devices are not powered enough to recognise peripherals, i always recommend buying a mains powered usb hub as the pc's supply can find it difficult to power the usb ports enough as well as powering other components in your pc.

Posted on Sep 12, 2008

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Where is the USB root hub on a Gateway PC so I can plug in my mass storage device


You don't plug a device into a root hub. The root hub is the central detribution point for all the USB ports on your computer. Your storage device should plug into any available USB port. If you are talking about an internal port then it is possible that you dont have one or may have to attach wires to make a port usable. Take it to your local computer guru and he/she should be able to help you for little or no cost.

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I have sahara n1356 laptop which freezes mouse and keyboard when i start it. what could be a problem


Try following tips:
Try to connect your keyboard and mouse directly to your laptop's USB ports (instead of using the USB hub) and see if they still freeze.
OR
It sounds like you're using an unpowered hub, which in my experience tends to cause most common errors with USB peripherals. It's definitely not recommended to connect any USB devices which aren't supplied with a power adapter (for instance some 2.5" external HDs and those small photo printers). These sort of devices should be connected directly to your laptop at all times.
You could also consider buying a powered hub, i.e. an USB hub which draws its power from a separate power adapter (and not your single laptop USB port).

if it doesn't work you can try this..

Click Start, and type device manager in the Start Search box.
Click Device Manager in the Programs list.
If you are prompted for an administrator password or confirmation, type your password or click Continue.
In the Device Manager dialog box, expand Universal Serial Bus controllers.
Right-click USB Root Hub and then click Properties.
In the USB Root Hub Properties dialog box, click the Power Management tab.
Remove the check from the Allow the computer to turn off this device to save power check box. Repeat steps 1 through 4 for each USB Root Hub listed in the Device Manager.

Under Power settings, check the 'USB settings' -> 'USB selective suspend settings' and make sure it is disabled.
Check Thumbnail, highlighted: Open Device manager, Double click on Universal Serial Bus controller at the bottom, Double Click USB Root Hub, Click Power Management on top right, Uncheck Allow Power...
Hope it works for you.

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My computer tells me that if my wireless adaptor was plugged into a different USB root hub it would work faster. How is this done?


Try plugging the wireless adapter into one of the usb slots on the back of the computer. If it still shows that message, I wouldn't worry. The difference in speed is negligible at best. hope this helps

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I have an inspiron laptop. the two USB on the side stopped working all of a sudden however when I checked the computer stated that they are working fine


may i know what device was connected to those ports?try connecting a mouse to the same ports and see whether it is detected.If it works well and fine.Other wise goto Control panel>>System>>Device manager>>Universal Serial Bus Controllers>>Here, delete all the USB Root hubs.If you are removing them using a mouse connected,then u might lose the mouse response after u delete the USB Root hubs.Please note this.Restart the system after deleting all the Root hubs and wait for a few seconds for them to get installed back.Restart again and confirm whether the issue is resolved

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1 Answer

Location of USB Root Hub


Hi dottyo,

Generally the front USB ports on a computer are USB version 1.1, good for USB keyboard and mouse or printer.

But, almost always the USB ports on the back of the pc are USB version 2.0 which is what you are looking for. Try any ports on the back of the pc case.

Hope that helps!

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I have bought a 4 port triangular hub for my laptop which a has a windows xp operating system but when i plug it in the computer won't recognise it. I tried to install by "adding new harware" but...


Try other ports in your laptop aside from the one you tried to plug into. Some USB plugs do not plug well into the USB port. It may be a factory defect. If it is still under warranty, you may have it replaced. Make sure you bring your laptop with you when you do this to make sure the new USB hub works.

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My usb ports are going out one by one. I have 3 total in my HP pavillion laptop. 6 months ago one of the just stopped working, for not apperent reason. Acouple of months later, the other one went out, and...


Hi dserdio,
Right click my computer
then select properties
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scroll down and expand Universal Serial Bus

do you see USB root HUB?
right click and un-install them.
reboot your laptop and wait for the system to recognize the USB root hub, it will auto install the drivers for it...

just make sure you dont have anything plug in to it.

ill wait for your feedback. hope its a fix. :)

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1 Answer

USB Ports


one way would be to download and install latest device drivers from the net. it should help.. if you are using win XP, there is likely a BIOS or Windows configuration problem. On some computers there is a configuration option in the BIOS that asks whether an IRQ should be assigned to USB. Although the option's actual wording varies among BIOS manufacturers, you must enable this option by setting it to either On or Yes (depending on your BIOS manufacturer and BIOS version). Otherwise no USB devices will work on XP. A problem with Windows XP’s USB Controller configuration can also prevent any USB devices from working. To determine whether the USB controllers are working properly, open Device Manager and expand the Universal Serial Bus Controllers node. Beneath this node, you should see a USB Universal Host Controller and a USB Root Hub. Depending on your PC, there will either be a USB Universal Host Controller and a USB Root Hub listed for each of your computer’s USB ports or a USB Universal Host Controller and USB Root Hub for multiple ports

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