Problems with modemmanager and Sierra EM7345 on resume

[Ernst Lehmann]

Hi List,

perhaps this has been asked before. So my appology first.


But after 5 days of googling (tons of pages), and trying every hint I
found. I gave up, and now hope for help from you developers.


my setup:

- Thinkpad X1 Carbon 2nd gen
- Sierra EM7345 4G-Modem.

Ubuntu 14.04. with Networkmanager (0.9.8.8)


I tried with:
- modemmanager-1.0.0 (Ubuntu repo 14.04 default)
- libqmi-1.8.0 (Ubuntu repo 14.04 default)
- libmbim-1.6.0 (Ubuntu repo 14.04 default)

and with
- modemmanager-1.4.4 (build myself, with debian rules)
- libqmi-1.12.4 (build myself, with debian rules)
- libmbim-1.12.2 (build myself, with debian rules)

cdc-acm.so is blacklisted...


The problem is, after resume the network-manager can not connect to 4G.
Device not found.


nmcli dev list shows me an incrementing GENERAL.UDI for the 4G Modem.

It startet with /org/freedesktop/ModemManger1/Modem/0

and after two cycles of suspend/resume I am on

/org/freedesktop/ModemManager1/Modem2


here an example:

------

GENERAL.DEVICE:                         cdc-wdm0
GENERAL.TYPE:                           gsm
GENERAL.VENDOR:                         --
GENERAL.PRODUCT:                        --
GENERAL.DRIVER:                         cdc_mbim
GENERAL.DRIVER-VERSION:
GENERAL.FIRMWARE-VERSION:
GENERAL.HWADDR:                         (unknown)
GENERAL.STATE:                          30 (disconnected)
GENERAL.REASON:                         0 (No reason given)
GENERAL.UDI:
/org/freedesktop/ModemManager1/Modem/2
GENERAL.IP-IFACE:
GENERAL.NM-MANAGED:                     yes
GENERAL.AUTOCONNECT:                    yes
GENERAL.FIRMWARE-MISSING:               no
GENERAL.CONNECTION:                     not connected
CAPABILITIES.CARRIER-DETECT:            no
CAPABILITIES.SPEED:                     unknown
CONNECTIONS.AVAILABLE-CONNECTION-PATHS:
/org/freedesktop/NetworkManager/Settings/{0}
CONNECTIONS.AVAILABLE-CONNECTIONS[1]:
2e5ea13b-1307-4fa5-81b3-803fb6c8927d | T-Mobile(Telekom)

----------

is there any solution for this device-UDI-increment?

I think of this, as my problem for networkmanager to adress the Modem
after resume.


Thanks for your help, and sorry If it has asked before.

Kind regards

Ernst


-- 

Bye

	Ernst
---------
Ernst Lehmann             Email: lehmann at acheron.franken.de