root@IPCam_HI35xx:/# [  491.411097] usb 1-1: new high-speed USB device number 75 using hiusb-ehci
[  491.541102] usb 1-1: device descriptor read/64, error -71
[  491.781104] usb 1-1: device descriptor read/64, error -71
[  492.011100] usb 1-1: new high-speed USB device number 76 using hiusb-ehci
[  492.141286] usb 1-1: device descriptor read/64, error -71
[  492.381095] usb 1-1: device descriptor read/64, error -71
[  492.611093] usb 1-1: new high-speed USB device number 77 using hiusb-ehci
[  493.041092] usb 1-1: device not accepting address 77, error -71
[  493.161118] usb 1-1: new high-speed USB device number 78 using hiusb-ehci
[  493.591084] usb 1-1: device not accepting address 78, error -71
[  493.597081] hub 1-0:1.0: unable to enumerate USB device on port 1
[  494.081098] usb 2-1: new full-speed USB device number 4 using hiusb-ohci
[  494.258127] usb 2-1: not running at top speed; connect to a high speed hub
[  494.309297] scsi2 : usb-storage 2-1:1.0
[  494.321769] usb 2-1: USB disconnect, device number 4
[  494.871268] usb 1-1: new high-speed USB device number 79 using hiusb-ehci
[  495.021230] usb 1-1: device descriptor read/64, error -71
[  495.271292] usb 1-1: device descriptor read/64, error -71
[  495.501246] usb 1-1: new high-speed USB device number 80 using hiusb-ehci
[  495.651378] usb 1-1: device descriptor read/64, error -71
[  495.891238] usb 1-1: device descriptor read/64, error -71
[  496.121265] usb 1-1: new high-speed USB device number 81 using hiusb-ehci
[  496.561196] usb 1-1: device not accepting address 81, error -71
[  496.681236] usb 1-1: new high-speed USB device number 82 using hiusb-ehci
[  497.121102] usb 1-1: device not accepting address 82, error -71
[  497.127100] hub 1-0:1.0: unable to enumerate USB device on port 1
[  497.611106] usb 2-1: new full-speed USB device number 5 using hiusb-ohci
[  497.788128] usb 2-1: not running at top speed; connect to a high speed hub
[  497.844148] scsi3 : usb-storage 2-1:1.3
[  497.871438] scsi4 : usb-storage 2-1:1.4
[  498.868433] scsi 3:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
[  498.888440] scsi 4:0:0:0: Direct-Access     HUAWEI   TF CARD Storage  2.31 PQ: 0 ANSI: 2
[  498.975373] sd 4:0:0:0: [sda] Attached SCSI removable disk