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Have problem with host controler,so one of the root USB read unknown device

My computer have problem with host controler

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Plz install the chipset drivers

Posted on Apr 21, 2009

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How to enable usb port LG 22LD330


On the desktop, right click on MY COMPUTER, and then select MANAGE option. a new window will appear, in that select SYSTEM TOOLS, in that click on DEVICE MANAGER, on the right side of the window pane, a list wil appear,
If USB is enabled in BIOS or EFI but the USB host controller does not appear in Device Manager (under Universal Serial Bus controllers), or a yellow warning icon appears next to the host controller name, then the version of BIOS or EFI may be outdated. Contact the maker or vendor for your computer and obtain the current version of BIOS or EFI.
If the controller appears in Device Manager, right-click the controller name and then click Properties. Problems and suggested actions are displayed under Device status.
USB ports have a separate entry in Device Manager. To check the device status, click Universal Serial Bus controllers, right-click USB Root Hub, and then click Properties. If you do not see USB Root Hub, you might not have a USB port installed on your computer
On the USB Root hub Properties page, it may tell you this device is working properly, or there is a Troubleshoot button. At the bottom you have an option to Enable or Disable the USB hub.

Jan 22, 2014 | LG Computers & Internet

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Acer Extensa5620z originally had Vista, I wiped the hard drive and installed W7. Its not as simple as I thought. Now I need to update drivers and Acer.com doesn't have anything listed. In the det


Windows 7 should automatically install device drivers for the Audio, Video and Network, If you are unable to find/download a device driver that works on your computer and your computer is connected to the Internet then - 1. Remove the driver that isn't working if it was installed.
2. Set Win-7 "Windows Device Installation" to 'AUTO'
3. Windows will automatically search the internet for the driver.
4. Reboot your computer.

Mar 19, 2013 | AU Optronics Acer Extensa 5620-4801...

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Cant find driver for SimpleTech 250gb external hd. Is it available?


Should not be necessary. It is recognized by the system automatically. Try connecting to another port, check the data cable and the connection to the unit, it may be corroded or loose.

Sep 13, 2011 | SimpleTech 250GB USB2.0 7200 RPM External...

1 Answer

My Panasonic CF-74 doesn't seem to be detecting anything I am plugging into the USB ports or the COM port.


Some motherboard BIOS's allow you to specify how many USB ports you want enabled
go to your Control Panel, System, Device Manager.

go down to where it says Universal Serial Bus Controllers, click the + sign,
you will see a list of devices, probably something like this
via rev5 usb host controller
via rev5 usb host controller
usb printing support
usb mass storage controller
usb root hub
usb root hub

right click on the ones that say via or intel or SIS, or ALI, or Standard open host controller, and choose uninstall.

you will be asked if your sure, and you will see some of the USB root hubs disappear.

If you are asked to restart, choose no, and remove the other via/sis/intel/etc open host controller (s) from your system, when they have all been removed restart your computer.

when the computer restarts, it will detect the USB controller and connected devices, reinstall the drivers/software

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1 Answer

7950 gx2 cant enable sli mood (single card)


Disable plug & play from BIOS. Now re-install the game and the required driver. From Control Panel--systems--Device Manager, check the properties of the Graphics card drivers and check if there is any clash of resources, if so then allot it manually. Hope this works....sodeep

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1 Answer

Usb ports not working


  1. Checking USB device status in Device Manager
  1. Right-click My Computer on the Windows desktop and then click Properties.
  2. Click the Device Manager tab to display the Device Manager window as shown at the right. (For Windows 2000 systems, click the Hardware tab and then the Device Manager button.
  3. In the Device Manager list, click the + sign next to Universal serial bus controller.
  4. Verify that a USB host controller and a USB root hub are listed below Universal serial bus. image002.jpg
  5. If Universal serial bus controller, USB host controller or USB root hub are not listed, close the Device Manager and go to USB port incorrectly configured in BIOS
  6. If Universal serial bus controller, USB host controller and USB root hub are listed but one or more display a yellow exclamation point, go to USB controller IRQ conflict
  7. If you have Windows XP, right-click the Host Controller and select Properties from the drop-down menu. If you see this status message in the Properties window: The drivers for this device are not installed (code 28), go to Windows XP USB 2.0 driver not installed .
  8. If Universal serial bus controller, USB host controller and USB root hub are listed but one or more display a red X, go to USB controller or root hub disabled in Windows Device Manager.
USB port incorrectly configured in BIOS NOTE: The procedure in this section is intended for advanced users only. Incorrect BIOS settings could prevent your computer from starting or operating normally. If you are not experienced in making changes to your computer BIOS, consult your computer instructions or contact your computer manufacturer for assistance before attempting the steps below.
  1. Follow the instructions of your computer to view the BIOS settings. These settings are sometimes called CMOS settings or system setup.
  2. To view the BIOS settings, press a key, such as F2 or Delete, just after you turn on the computer. Instructions often appear on the screen briefly when you turn on the computer. Also check the instructions and manuals provided with your computer.
  3. Look for USB Interface or a similar setting in the Advanced Setup, Peripheral Configuration or another section of your computer BIOS settings.
  4. Follow the onscreen instructions or read the computer documentation to enable the USB port.
  5. Follow the onscreen instructions to save the new settings and restart the computer.

  1. USB controller or root hub disabled in Windows Device Manager
  1. Right-click My Computer on the Windows desktop and then click Properties.
  2. Click the Device Manager tab. (On Windows 2000 and XP systems, click the Hardware tab and then the Device Manager button.)
  3. In the Device Manager list, click the + sign next to Universal serial bus controller.
  4. Click the line in the Device Manager containing the red X.
  5. Click the Properties button. (On Windows 2000 and XP systems, click Properties on the Action menu.)
  6. In the Communications Port Properties box, click the Resources tab.
  7. Re-enable the USB device by clicking the Enable Device button and follow the onscreen instructions.

Dec 28, 2008 | Acer (91.42R37.001) CD-RW/DVD-ROM (Combo)...

1 Answer

Computer not recognizing any usb devices


Well, appears that your configuration can handle 4 GB of memory. I checked the Acer website for upgrades for your model, and nothing appears to jump out which could solve your problem. A few appear to be possibly helpful, but some are for XP, not Vista. Upgrading "launch manager" might be a good thing.

However, Belarc tells me that on my Acer 5630 i have listed under "Bus adapters" the following:
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C8
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27C9
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CA
Intel(R) 82801G (ICH7 Family) USB Universal Host Controller - 27CB
Intel(R) 82801G (ICH7 Family) USB2 Enhanced Host Controller - 27CC
And, under "other devices", i have a USB Root Hub (5x). Obviously, the two match. I go to device manager to check them out, finding them under 'univesal bus controllers", to see whether they are all working properly, and and they are. In addition, opening "system devices" reveals something called a "plug and play software device enumerator", and that checks out to be working fine as well. Check your equivalent out to see if you find a problem to fix. Hopefully you will. Let me know how things go.

Apr 21, 2008 | Acer Aspire 5610-4648 Notebook

1 Answer

USB devices not seen


i'm looking for those with question marks or exclamation points...

Mar 28, 2008 | Computers & Internet

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

Jan 20, 2008 | Gateway GT5432 Refurbished AMD Desktop...

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