Sierra EM7511 modem not found

Thu Aug 29 16:08:06 UTC 2019

Hey,

>
> Struggling to understand the steps necessary for ModemManager to detect a Sierra Wireless EM7511 modem.  I'm using an embedded Linux distro (created via Buildroot).
>
> mmcli can't seem to find any modems:
> # mmcli -L
>
> No modems were found
>
>
> Here is my output from ModemManager.  Nothing in here looks problematic to me, but I'm not sure if I should see some debug messages after the service is acquired or not.
>
> Jul 24 16:19:12 Microserver daemon.info ModemManager[2151]: <info>  [1563985152.471030] ModemManager (version 1.8.0) starting in system bus...
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.475722] Bus acquired, creating manager...
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476385] [filter] created
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476425] [filter]   explicit whitelist:         yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476447] [filter]   virtual devices forbidden:  yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476470] [filter]   net devices allowed:        yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476487] [filter]   cdc-wdm devices allowed:    yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476507] [filter]   tty devices:
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476532] [filter]       blacklist applied:        yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476553] [filter]       manual scan only applied: yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476575] [filter]       platform driver check:    yes
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476592] [filter]       driver check:             no
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476611] [filter]       cdc-acm interface check:  no
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476628] [filter]       with net check:           no
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476648] [filter]       default:                  allowed
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.476781] [plugin manager] looking for plugins in '/usr/lib/ModemManager'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.479802] [plugin manager] loaded plugin 'Wavecom'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.481549] [plugin manager] loaded plugin 'u-blox'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.483091] [plugin manager] loaded plugin 'Motorola'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.484627] [plugin manager] loaded plugin 'Via CBP7'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.486114] [plugin manager] loaded plugin 'Pantech'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.487651] [plugin manager] loaded plugin 'Novatel LTE'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.489408] [plugin manager] loaded plugin 'Novatel'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.491419] [plugin manager] loaded plugin 'Dell'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.492954] [plugin manager] loaded plugin 'Nokia'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.494531] [plugin manager] loaded plugin 'MTK'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.496052] [plugin manager] loaded plugin 'Haier'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.497676] [plugin manager] loaded plugin 'Sierra (legacy)'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.499249] [plugin manager] loaded plugin 'Nokia (Icera)'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.500987] [plugin manager] loaded plugin 'Telit'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.502464] [plugin manager] loaded plugin 'AnyDATA'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.504084] [plugin manager] loaded plugin 'Thuraya'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.505620] [plugin manager] loaded plugin 'Samsung'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.507373] [plugin manager] loaded plugin 'Huawei'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.509075] [plugin manager] loaded plugin 'Altair LTE'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.510678] [plugin manager] loaded plugin 'X22X'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.512200] [plugin manager] loaded plugin 'Longcheer'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.513528] [plugin manager] loaded plugin 'Quectel'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.514902] [plugin manager] loaded plugin 'Generic'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.516531] [plugin manager] loaded plugin 'Option High-Speed'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.518135] [plugin manager] loaded plugin 'Option'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.519993] [plugin manager] loaded plugin 'Cinterion'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.521513] [plugin manager] loaded plugin 'Iridium'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.522964] [plugin manager] loaded plugin 'Ericsson MBM'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.524571] [plugin manager] loaded plugin 'Linktop'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.525899] [plugin manager] loaded plugin 'Sierra'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.527482] [plugin manager] loaded plugin 'ZTE'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.528892] [plugin manager] loaded plugin 'SimTech'
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.530259] [plugin manager] successfully loaded 32 plugins
> Jul 24 16:19:12 Microserver daemon.debug ModemManager[2151]: <debug> [1563985152.531416] Service name 'org.freedesktop.ModemManager1' was acquired
>

Did you by any chance build ModemManager without udev support? (i.e.
without libgudev)

-- 
Aleksander
https://aleksander.es