Hi Karoly, which modem are you using?
cdc-wdmX and tty ports are used for totally different communication protocols. Like, if you're modem supports QMI or MBIM, it's ok to use cdc-wdmX, otherwise is ok to use tty. Also consider that is up to the kernel to assign the number at the end of cdc-wdmX and that number depends on which other hardware is connected to USBs. i.e. when I have my usb earphones connected, the kernel assigns cdc-wdm1 to the modem instead of cdc-wdm0. Carlo On 4 July 2017 at 15:36, Karoly Pados <[email protected]> wrote: > Hello, > > Sometimes MM picks the wrong primary port. What I observed is that > everything works if it picks cdc-wdm0. But pretty often it picks cdc-wdm1, > in which case NetworkManager is unable to establish a data connection. > Sometimes, much more rarely, it even picks ttyUSB0, and NM is then also > unable to do anything useful with the modem. > > Now I'm not 100% sure that this is the cause for our problems, so my first > question: Is it plausible at all that anything other than cdc-wdm0 as a > primary port is a problem? > > If so: > - What can I provide to help solve this in code? > - Is there a way around it? (for example, a way to force MM to pick a > specific port as primary?) > > Thank you, > Karoly > _______________________________________________ > ModemManager-devel mailing list > [email protected] > https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel >
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