这个问题怎么引起的呢？

otg_wakelock_init: No USB transceiver found
usb 2-1: new low-speed USB device number 2 using hiusb-ohci
usb 2-1: device descriptor read/64, error -62
usb 2-1: device descriptor read/64, error -62
usb 2-1: new low-speed USB device number 3 using hiusb-ohci
usb 2-1: device descriptor read/64, error -62
usb 2-1: device descriptor read/64, error -62
usb 2-1: new low-speed USB device number 4 using hiusb-ohci
usb 2-1: device not accepting address 4, error -62
usb 2-1: new low-speed USB device number 5 using hiusb-ohci
usb 2-1: device not accepting address 5, error -62
hub 2-0:1.0: unable to enumerate USB device on port 1
这个问题怎么引起的呢？