Ok Greg :) On Tue, Aug 9, 2016 at 1:44 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Tue, Aug 09, 2016 at 12:48:12PM +0530, Ajay Garg wrote: >> 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. > > Why not ask the modem manager team about this? The kernel doesn't care > what you do with the device links :) > > thanks, > > greg k-h -- 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
