[ubuntu-in] keyboard and mouse not working in ubuntu

[sowmya bobba]

hii
i dualbooted my laptop with windows 7 and ubuntu. yesterday i installed
updates in ubuntu from update manager.some error occured while installing
them so i restarted the laptop.from then onwards my keyboard and mouse are
not working properly in ubuntu but mouse through usb is working
fine.keyboard and mouse r working fine in windows...i can't do anything in
ubuntu becoz for anything it is asking my password.ubuntu is driving me mad
please help me...
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