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On 2015-07-02T11:11:18+00:00 Kai-Heng Feng wrote:

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.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/7

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On 2015-07-02T11:12:06+00:00 Kai-Heng Feng wrote:

Created attachment 116876
Message from mbimcli.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/8

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On 2015-07-06T07:43:26+00:00 Aleksander Morgado wrote:

Looks like the mbim-proxy cannot get the MBIM port open.

Could you run the following sequence?

[stop ModemManager]
$ sudo /usr/libexec/mbim-proxy --verbose > proxy.log 2>&1 &
$ sudo /usr/sbin/ModemManager --debug

And send back the proxy log?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/9

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On 2015-07-06T09:29:23+00:00 Kai-Heng Feng wrote:

Created attachment 116969
Log file from mbim-proxy.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/10

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On 2015-07-06T10:14:07+00:00 Aleksander Morgado wrote:

(In reply to Kai-Heng Feng from comment #3)
> Created attachment 116969 [details]
> Log file from mbim-proxy.

Looks like the proxy didn't receive anything. Was ModemManager run
*after* running the proxy?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/11

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On 2015-07-06T10:32:47+00:00 Kai-Heng Feng wrote:

Created attachment 116971
Log file from mbim-proxy.

Yes. There was already a ModemManager instance running. Here's the
correct log.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/12

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On 2015-07-06T10:39:25+00:00 Aleksander Morgado wrote:

(In reply to Kai-Heng Feng from comment #5)
> Created attachment 116971 [details]
> Log file from mbim-proxy.
> 
> Yes. There was already a ModemManager instance running. Here's the correct
> log.

Thanks. Pretty weird, the modem doesn't seem to ever reply to any MBIM
message...

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/13

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On 2015-07-08T05:33:03+00:00 Kai-Heng Feng wrote:

Is there any chance that cdc_mbim kernel module does not support this
card?

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/14

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On 2015-07-17T11:19:42+00:00 Kai-Heng Feng wrote:

Now I can make the device work by changing the retry timer from 1s to 4s in mbim_device_command():
http://cgit.freedesktop.org/libmbim/libmbim/tree/src/libmbim-glib/mbim-device.c#n1234

After changing that, the device can operate normally.
So looks like it may be a driver/firmware/hardware problem.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1441095/comments/15


** Changed in: modemmanager
       Status: Unknown => Confirmed

** Changed in: modemmanager
   Importance: Unknown => Medium

-- 
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https://bugs.launchpad.net/bugs/1441095

Title:
  novatel: improve probing for Dell branded modems

Status in ModemManager:
  Confirmed
Status in OEM Priority Project:
  Incomplete
Status in OEM Priority Project trusty series:
  New
Status in modemmanager package in Ubuntu:
  New
Status in modemmanager source package in Trusty:
  New

Bug description:
  Dell rebrands modems from different vendors, including Novatel, Sierra
  and Ericsson. Until now we defaulted to the Novatel plugin when a Dell
  device was found, but then we're breaking newer MBIM Sierra Dell-
  branded modems, as we don't have MBIM support in the Novatel plugin.

  So, we should try to improve the probing in the Novatel, Sierra and
  MBM plugins, so that they probe also Dell devices, and we'll then try
  to match via AT-probing which plugin should be handling the Dell
  device.

  
  https://bugs.freedesktop.org/show_bug.cgi?id=86713

  Could we backport this patch  into trusty? Thanks!

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