I looked at the source code, and that disabled dropdown is related to the last check (in that window), "Always show a connected device if possible".
If you uncheck "Always show a connected device if possible", that dropdown gets enabled, so you can select the device you want. Regards, Marcelo -- netspeed: Netspeed applet has disabled device change https://launchpad.net/bugs/56500 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs