ModemManager 1.6.4 on Raspbian Stretch cannot acquire the 'org.freedesktop.ModemManager1' service name

[Aleksander Morgado]

Hey,

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> I am trying to get a UART connected modem working with Modem Manager.
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> When I run ModemManager in Debug I get this error
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> Could not acquire the 'org.freedesktop.ModemManager1' service name
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You need to stop the system-managed ModemManager before you run your
own instance in debug mode; try:

$ sudo systemctl stop ModemManager
$ sudo /usr/sbin/ModemManager --debug

See https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/

-- 
Aleksander
https://aleksander.es