Hi All. We are using Sierra's USB-to-WWAN driver on Ubuntu-14 for Sierra's MC8090 modem, and we have a requirement wherein we need to have access to the modem-serial-port (from our user-application that is). Right now, we see that /usr/sbin/ModemManager is always connected to /dev/ttyUSB3 (which means we cannot connect to the port from our application at the same time, or even if we can, received-data will be at best inconsistent). We are thinking of the following :: * Initially, let nmcli and ModemManager do their work, and let them bring the WWAN interface up. * Once this happens, we permanently-down the ModemManager from our application-binary, thereby freeing up /dev/ttyUSB3. * Thereafter, we are free to connect to /dev/ttyUSB3 from our application, thereby using features like SMS-notification (+CMTI), signal-strength (+CSQ), etc. Does our approach make sense? We will be grateful to any help. Thanks and Regards, Ajay -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html