Comment 1 for bug 700261

You can probably blacklist like it is done for some other devices. Look at:

/lib/udev/rules.d/77-mm-pcmcia-device-blacklist.rules
/lib/udev/rules.d/77-mm-qdl-device-blacklist.rules

and add a line like this:

ATTRS{prod_id1}=="Gemplus", ATTRS{prod_id2}=="SerialPort", ATTRS{prod_id3}=="GemPC Card", ENV{ID_MM_DEVICE_IGNORE}="1"

This blacklisting should probably not be added to Ubuntu; someone might want to connect a modem or GPS to one of those serial adapters.