OK the relevant stuff is:
$this->bbcode_second_pass_code('', '[ 3030.723089] usb 2-1.1: USB disconnect, device number 11
[ 3038.181133] usb 2-1.1: new high-speed USB device number 12 using ehci-pci
[ 3038.274846] usb 2-1.1: New USB device found, idVendor=15a2, idProduct=0054
[ 3038.274856] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 3038.274861] usb 2-1.1: Product: SE Blank ARIK
[ 3038.274865] usb 2-1.1: Manufacturer: Freescale SemiConductor Inc
[ 3038.277720] hid-generic 0003:15A2:0054.0008: hiddev0,hidraw0: USB HID v1.10 Device [Freescale SemiConductor Inc SE Blank ARIK] on usb-0000:00:1d.0-1.1/input0
[ 4657.071710] usb 2-1.1: USB disconnect, device number 12
[ 4667.247083] usb 2-1.1: new high-speed USB device number 13 using ehci-pci
[ 4667.339820] usb 2-1.1: New USB device found, idVendor=15a2, idProduct=0054
[ 4667.339824] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 4667.339826] usb 2-1.1: Product: SE Blank ARIK
[ 4667.339828] usb 2-1.1: Manufacturer: Freescale SemiConductor Inc
[ 4667.341725] hid-generic 0003:15A2:0054.0009: hiddev0,hidraw0: USB HID v1.10 Device [Freescale SemiConductor Inc SE Blank ARIK] on usb-0000:00:1d.0-1.1/input0
[ 4677.290671] usb 2-1.1: USB disconnect, device number 13
[ 4677.488004] usb 2-1.1: new high-speed USB device number 14 using ehci-pci
[ 4677.581445] usb 2-1.1: New USB device found, idVendor=15a2, idProduct=0054
[ 4677.581455] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 4677.581461] usb 2-1.1: Product: SE Blank ARIK
[ 4677.581465] usb 2-1.1: Manufacturer: Freescale SemiConductor Inc
[ 4677.586262] hid-generic 0003:15A2:0054.000A: hiddev0,hidraw0: USB HID v1.10 Device [Freescale SemiConductor Inc SE Blank ARIK] on usb-0000:00:1d.0-1.1/input0')
So we see it coming up in serial mode when it enumerates as 15a2, then it detaches - which is probably what happened after bootbomb started running. But when it comes back again it is still in 15a2 mode, so looks like it is still in serial boot mode.