usb 2-1: USB disconnect, address 2
usb 2-1: new full speed USB device using uhci_hcd and address 3
usb 2-1: configuration #1 chosen from 1 choice
cdc_acm 2-1:1.0: ttyACM0: USB ACM device
usbcore: registered new driver cdc_acm
drivers/usb/class/cdc-acm.c: v0.25:USB Abstract Control Model driver for USB modems and ISDN adapters
usb 2-1: USB disconnect, address 3
usb 2-1: new full speed USB device using uhci_hcd and address 4
usb 2-1: unable to read config index 0 descriptor/start
usb 2-1: can't read configurations, error -84
usb 2-1: new full speed USB device using uhci_hcd and address 6
usb 2-1: configuration #1 chosen from 1 choice
scsi1 : SCSI emulation for USB Mass Storage devices
usb-storage: device found at 6
usb-storage: waiting for device to settle before scanning
  Vendor: E61       Model: miniSD            Rev:  1.0
  Type:   Direct-Access                      ANSI SCSI revision: 02
sd 1:0:0:0: Attached scsi removable disk sda
sd 1:0:0:0: Attached scsi generic sg0 type 0
usb-storage: device scan complete