ModemManager: symbol lookup error: ModemManager: undefined symbol: mm_kernel_event_properties_get_type

[Einar Jón]

Hi

Sorry for the late response. I only get the digest and don't follow
all the topics. See below.

Regards
Einar Jón
+31 610 957234

On 7 April 2017 at 10:41,
<modemmanager-devel-request at lists.freedesktop.org> wrote:
>    2. Re: ModemManager: symbol lookup error: ModemManager:
>       undefined symbol: mm_kernel_event_properties_get_type
>       (Aleksander Morgado)
> ------------------------------
>
> Message: 2
> Date: Fri, 7 Apr 2017 09:47:20 +0200
> From: Aleksander Morgado <aleksander at aleksander.es>
> To: Jan Graczyk <JanG at nytec.com>
> Cc: "modemmanager-devel at lists.freedesktop.org"
>         <modemmanager-devel at lists.freedesktop.org>
> Subject: Re: ModemManager: symbol lookup error: ModemManager:
>         undefined symbol: mm_kernel_event_properties_get_type
> Message-ID:
>         <CAAP7uc+teW4WZOhJzCrtYwApoCN-=kcUNhvKHNmVQHei7-FWYw at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> On Fri, Apr 7, 2017 at 12:14 AM, Jan Graczyk <JanG at nytec.com> wrote:
>> I found no qmi wwan device present in /dev directory even though the qmi_wwan.ko module is inserted. I am running Linux version 4.1.15 and I have mini PCie Quectel UC20 modem module installed on my development board. Is that the qmi wwan device is only created when USB based modem is installed on a development board?
>
> Looks like 4.1.15 isn't new enough. This is what another user, Einar
> Jón, replied to you some days ago:
> https://lists.freedesktop.org/archives/modemmanager-devel/2017-April/004409.html

Note that qmi wwan is a kernel module, and it does not create a device in /dev.
It does however depend on the cdc_wdm module, and that one should be
seen in /dev. It should be loaded on startup, so you see it in dmesg.

If all is well, you should have a /dev/cdc-wdm0 (and /dev/ttyUSB0 to
/dev/ttyUSB3).
Furthermore,the command lsmod should show you qmi_wwan, cdc_wdm and
some related kernel modules.

On my ArmXL:
$ dmesg | grep -i qmi
[    4.371036] qmi_wwan 1-1.3:1.4: cdc-wdm0: USB WDM device
[    4.372191] qmi_wwan 1-1.3:1.4 wwan0: register 'qmi_wwan' at
usb-musb-hdrc.0.auto-1.3, WWAN/QMI device, de:66:89:95:aa:b0
[    4.373520] usbcore: registered new interface driver qmi_wwan
$ lsmod | grep wwan
qmi_wwan               11700  0
cdc_wdm                10185  2 qmi_wwan
usbnet                 21957  1 qmi_wwan
$ ls /dev/*USB* /dev/cdc*
/dev/cdc-wdm0  /dev/ttyUSB0   /dev/ttyUSB1   /dev/ttyUSB2   /dev/ttyUSB3

hope this helps
Einar Jón