Comment 14 for bug 1441095

Created attachment 116875
Debug message from ModemManager.

The EM7455 (Dell DW5811e) is not working when using the git master ModemManager/libmbim/libqmi.

The last message piece from "ModemManager --debug":
ModemManager[2470]: <info> [1435834110.545710] [mm-device.c:520] mm_device_create_modem(): Creating modem with plugin 'Dell' and '2' ports
ModemManager[2470]: <debug> [1435834110.545727] [dell/mm-plugin-dell.c:382] create_modem(): Dell-branded generic modem found...
ModemManager[2470]: <warn> [1435834110.545871] [mm-plugin.c:974] mm_plugin_create_modem(): Could not grab port (usbmisc/cdc-wdm0): 'Cannot add port 'usbmisc/cdc-wdm0', unsupported'
ModemManager[2470]: <debug> [1435834110.545898] [mm-base-modem.c:312] mm_base_modem_grab_port(): (wwan0) type 'net' claimed by /sys/devices/pci0000:00/0000:00:14.0/usb2/2-2
ModemManager[2470]: <debug> [1435834110.545926] [mm-base-modem.c:1493] finalize(): Modem (Dell) '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2' completely disposed
ModemManager[2470]: <warn> [1435834110.545939] [mm-base-manager.c:158] find_device_support_ready(): Couldn't create modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb2/2-2': Failed to find primary AT port

I tried mbimcli by "mbimcli -d /dev/cdc-wdm0 --query-device-caps --verbose":
[02 Jul 2015, 19:02:36] [Debug] opening device...
[02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Queried max control message size: 4096
[02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Sent message...
<<<<<< RAW:
<<<<<< length = 16
<<<<<< data = 01:00:00:00:10:00:00:00:01:00:00:00:00:10:00:00

[02 Jul 2015, 19:02:36] [Debug] [/dev/cdc-wdm0] Sent message (translated)...
<<<<<< Header:
<<<<<< length = 16
<<<<<< type = open (0x00000001)
<<<<<< transaction = 1
<<<<<< Contents:
<<<<<< max_control_transfer = 4096

And the transaction repeats for 30 times, in the end it says:

[02 Jul 2015, 19:03:06] [Debug] open operation timed out: closed
error: couldn't open the MbimDevice: Transaction timed out

But when using EM7305, everything works as expected.