3G Modem MC8805:qmicli succesfuly connected but no IP after dhclient

[Bjørn Mork]

"Benoît" <benoitne at gmail.com> writes:

> Many thanks
>
> I did it (writing udev rules) and now I can see ttyUSB0 ttyUSB1 ttyUSB2
> When I try to speak to the modem I always got a Transaction Timed out.
>
> It is like I am unable to unlock it? (qmicli -d /dev/cdc-wdm0
> --dms-set-fcc-authentication
> error: couldn't create client for the 'dms' service: CID allocation
> failed in the CTL client: Transaction timed out)
>
> all commands I try to pass are Timed out
>
> for ModemManager I tried to see:

> ModemManager[725]: <warn>  Could not grab port (usbmisc/cdc-wdm0):
> 'Cannot add port 'usbmisc/cdc-wdm0', unsupported'

This doesn't look good.  Is there something else holding the device
open? "lsof /dev/cdc-wdm0" will tell.  Was the configuration switch too
late?  "dmesg" will tell.  If it shows cdc_mbim probing before the
switch, then you will have to prevent that somehow.  Blacklisting
cdc_mbim maybe.


Bjørn