Comment 1 for bug 829916

I attached my dmesg as it could be helpful:

$ grep "USB device\|GSM" dmesg
[ 1.268077] usb 1-4: new high speed USB device using ehci_hcd and address 4
[ 1.536043] usb 1-5: new high speed USB device using ehci_hcd and address 5
[ 1.784057] usb 1-8: new high speed USB device using ehci_hcd and address 6
[ 2.160043] usb 2-1: new full speed USB device using uhci_hcd and address 2
[ 2.580045] usb 2-2: new low speed USB device using uhci_hcd and address 3
[ 86.164032] usb 1-4: new high speed USB device using ehci_hcd and address 7
[ 93.028032] usb 1-4: new high speed USB device using ehci_hcd and address 8
[ 93.427410] USB Serial support registered for GSM modem (1-port)
[ 93.428334] option 1-4:1.0: GSM modem (1-port) converter detected
[ 93.430537] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB0
[ 93.430561] option 1-4:1.1: GSM modem (1-port) converter detected
[ 93.432682] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB1
[ 93.432706] option 1-4:1.2: GSM modem (1-port) converter detected
[ 93.433111] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB2
[ 93.433340] option: v0.7.2:USB Driver for GSM modems

Could it be that usb serial support is loaded to late or what triggers "USB Serial support registered for GSM modem (1-port)"?