Could not acquire the 'org.freedesktop.ModemManager1' service name

[Dan Williams]

On Tue, 2017-03-21 at 16:33 +0000, Jan Graczyk wrote:
> Hello Aleksander,
> 
> Thank you for your response. I have actually stopped running Modem
> Manger and then I have issued the command ModemManager --debug. This
> time the service name was acquired. However I have got another
> problem. The mm-base-manager.c:314 reports error device added():
> (tty/ttymxc2): port's parent platform driver is not whitelisted. Do
> you know the solution for this problem? Thank you for your support.

What is the device hooked up to on the machine itself?  ModemManager
does not usually auto-probe various platform drivers, because it cannot
 know that a modem is connected as these are not USB/PCI/etc and either
do not provide device identifiers, or the device is a generic serial
adapter which doesn't necessarily indicate a modem either (eg, it could
have a UPS attached or something).

So generally for these devices, if you have one you know what you are
doing, and you can add a whitelist entry for it quite easily with udev
rules.  But let's confirm the details first.

Dan

> Best Regards,
> Jan Graczyk
> 
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> 
> -----Original Message-----
> From: Aleksander Morgado [mailto:aleksander at aleksander.es] 
> Sent: Tuesday, March 21, 2017 2:15 AM
> To: Jan Graczyk <JanG at nytec.com>
> Cc: modemmanager-devel at lists.freedesktop.org
> Subject: Re: Could not acquire the 'org.freedesktop.ModemManager1'
> service name
> 
> On Tue, Mar 21, 2017 at 12:55 AM, Jan Graczyk <JanG at nytec.com> wrote:
> > 
> > I have installed Quectel UC20 modem on my development board PCIe
> > bus. The Linux modem device for Quectel UC20 modem is showing up as
> > /dev/ttymxc2. When I try to run mmcli -L or ModemManager –debug the
> > message “Could not acquire the 'org.freedesktop.ModemManager1'
> > service name” is showing up. How to connect my Linux modem device
> > /dev/ttymxc2 to ModemManger? I appreciate very much help from you.
> 
> 
> Do you have the DBus daemon running in your system? ModemManager will
> grab the "org.freedesktop.ModemManager1" name in the system bus
> exposed by DBus; mmcli talks to ModemManager through that bus.
> 
> 
> --
> Aleksander
> https://aleksander.es
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