I'm sorry forgot kernel version: 3.13.0 . -- Chris Cheng 鄭宇廷 Atrust Computer Corp. 冠信電腦股份有限公司 http://www.atrustcorp.com Tel: +886-3-3288837 ext.1074 3F., No.361, Fusing 1st Rd., Gueishan Township, Taoyuan County 333, Taiwan 333 桃園縣龜山鄉復興一路361號3F 2014/1/21 Chris Cheng <chris.cheng@xxxxxxxxxxxxxx>: > Here is kernel message: > > [ 2.939251] usb 1-1: new high-speed USB device number 2 using ehci-pci > [ 18.490987] usb 1-1: device not accepting address 2, error -110 > [ 18.595095] usb 1-1: new high-speed USB device number 3 using ehci-pci > [ 34.182233] usb 1-1: device not accepting address 3, error -110 > [ 34.286352] usb 1-1: new high-speed USB device number 4 using ehci-pci > [ 44.744589] usb 1-1: device not accepting address 4, error -110 > [ 44.849590] usb 1-1: new high-speed USB device number 5 using ehci-pci > [ 55.307858] usb 1-1: device not accepting address 5, error -110 > [ 55.310239] hub 1-0:1.0: unable to enumerate USB device on port 1 > > Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html