U460 USB wont work

Hi
I have a U460. Whenever I plugged in a USB device (i.e. mouse, thumbdrive etc), it doesnt seem to work. I need to restart the computer with the devices plugged in before it can recognize the devices. This is very inconvenient.
Would appreciate your advice.
Thanks
Solved!
Go to Solution.

try to re-install intel chipset drivers and try to disable/enable "legacy power" in bios.
http://consumersupport.lenovo.com/uk/en/DriversDownloads/drivers_list.aspx?CategoryID=632157

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May 4 21:07:06 localhost kernel: [ 49.202535] usb 2-1.2: new high speed USB device number 10 using ehci_hcd
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U460 USB wont work

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