Cannot subscribe to ModemManager-devel

Aleksander Morgado aleksander at
Wed Feb 12 01:27:21 PST 2014

On Wed, Feb 12, 2014 at 10:18 AM, Aleksander Morgado
<aleksander at> wrote:
> On Wed, Feb 12, 2014 at 10:04 AM, Aleksander Morgado
> <aleksander at> wrote:
>> On Wed, Feb 5, 2014 at 11:15 AM, Aleksander Morgado
>> <aleksander at> wrote:
>>>>> Are you testing all three with the same SIM card?
>>>> Yes,  same host system, same software,  same SIM,  different cards.
>>>> I was under the impression that "card makers" could reduce costs by not
>>>> including various modules in their firmware.  Perhaps the PPP support or
>>>> something else is just not there.
>>> I keep on thinking that the PXS8 is QMI-based, same as the PLS8 that I
>>> have myself. Likely the VID/PIDs are just missing in qmi_wwan.
>> I got a Cinterion PHS8-P now, branded by MC technologies (not a PXS8),
>> and it actually only shows one tty and I see no QMI capabilities in
>> that one...
> Ah, look:
> ModemManager[25133]: <debug> [1392196544.656494]
> [mm-at-serial-port.c:436] debug_log(): (ttyUSB2): -->
> 'ATD*99***1#<CR>'
> ModemManager[25133]: <debug> [1392196544.693918]
> [mm-at-serial-port.c:436] debug_log(): (ttyUSB2): <-- '<CR><LF>+CME
> ERROR: 2<CR><LF>'
> ModemManager[25133]: <debug> [1392196544.693990]
> [mm-serial-parsers.c:364] mm_serial_parser_v1_parse(): Got failure
> code 2: Phone-adaptor link reserved
> I used a cinterion-specific command, which I'm not sure I'm able to
> disclose, to get multiple ttys in the device instead of the single
> ttyACM0, and now I get that error you were seeing. I wonder if it's
> just the wrong tty being picked for the data connection...

So yeah, in my case using ttyUSB2 gets me the Phone-adaptor link
reserved error, but when using ttyUSB3 it gets connected properly:

ModemManager[26453]: <debug> [1392197119.981303]
[mm-at-serial-port.c:436] debug_log(): (ttyUSB3): -->
ModemManager[26453]: <debug> [1392197120.030457]
[mm-at-serial-port.c:436] debug_log(): (ttyUSB3): <--

I'll try to dig a bit more to see if the modem tells us with some AT
command which port is supposed to do what. Otherwise, I guess we'll
need to add some port type hints in udev rules...


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