usb 3-1: new full speed USB device using ohci_hcd and address 2
usb 3-1: configuration #1 chosen from 2 choices
cdc_acm 3-1:1.0: ttyACM0: USB ACM device
usbcore: registered new interface driver cdc_acm
drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters