Comment 96 for bug 979697

I didn't have time to test another kernel as requested higher in the thread, but I found a workaround in the usbmodeswitch forums :

http://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?t=960

The idea is to "extract" the the configuration file from the collection in /usr/share/usb_modeswitch and then switch "manually" the modem.

For my modem, I took the file "12d1:1505" and made a small script to make the operation easier :

#!/bin/sh
/usr/sbin/usb_modeswitch -I -W -s 10 -c "12d1:1505" -v 12d1 -p 1505

Now all I have to do to switch the modem is : sudo ./switch

That's it !