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I have a problem about USB port not working. I'm using an Asus A42N laptop which has 3 USB ports. When I'm using Win7 all ports work well, then I log into Ubuntu and just 2 ports work. I dont know why.

$ lsusb

Bus 002 Device 002: ID 04f2:b1e5 Chicony Electronics Co., Ltd 
Bus 004 Device 003: ID 12d1:14ac Huawei Technologies Co., Ltd. 
Bus 006 Device 002: ID 15d9:0a4c Trust International B.V. USB+PS/2 Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
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