[  224.102201] usb 4-2:1.0: uevent                           
[  224.102318] drivers/usb/core/inode.c: creating file '002'
[  224.102359] usb 4-2: New USB device found, idVendor=6547, idProduct=0232
[  224.102362] usb 4-2: New USB device strings: Mfr=1, Product=3, SerialNumber=0
[  224.102364] usb 4-2: Product: USB-UART Controller
[  224.102366] usb 4-2: Manufacturer: ArkMicroChips
[  224.102370] hub 4-0:1.0: state 7 ports 3 chg 0000 evt 0004
[  224.102378] hub 7-0:1.0: state 7 ports 2 chg 0000 evt 0000
[  224.238028] ehci_hcd 0000:00:13.2: GetStatus port 1 status 001000 POWER sig=se0
[  224.238035] ehci_hcd 0000:00:13.2: failed handover port 1: 1000
[  224.249874] hub 2-0:1.0: hub_resume
[  224.249904] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0000
[  224.249978] usb usb6: usb auto-resume
[  224.249985] ohci_hcd 0000:00:13.1: resume root hub
[  224.309842] hub 6-0:1.0: hub_resume
[  224.309859] hub 6-0:1.0: state 7 ports 3 chg 0000 evt 0000
[  224.309901] usb usb5: usb auto-resume
[  224.309906] ohci_hcd 0000:00:13.0: resume root hub
[  224.369877] hub 5-0:1.0: hub_resume
[  224.369903] hub 5-0:1.0: state 7 ports 3 chg 0000 evt 0000