"port not candidate" error message with DELL Wireless 5570 (aka Sierra Wireless AirPrime 7W5P6)

[Aleksander Morgado]

Hey,

> > $ udevadm info /dev/cdc-wdm0
> > P: /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.6/3-
> > 1.6:2.12/usbmisc/cdc-wdm0
> > N: cdc-wdm0
> > L: 0
> > E: DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.6/3-
> > 1.6:2.12/usbmisc/cdc-wdm0
> > E: DEVNAME=/dev/cdc-wdm0
> > E: MAJOR=180
> > E: MINOR=0
> > E: SUBSYSTEM=usbmisc
>
> I cannot explain it, but udev is now working correctly.
>

There's something fishy going on with how events are handled, I cannot
explain it either.

> $ udevadm info /dev/cdc-wdm0
> P: /devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.6/3-1.6:2.12/usbmisc/cdc-wdm0
> N: cdc-wdm0
> L: 0
> E: DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb3/3-1/3-1.6/3-1.6:2.12/usbmisc/cdc-wdm0
> E: DEVNAME=/dev/cdc-wdm0
> E: MAJOR=180
> E: MINOR=0
> E: SUBSYSTEM=usbmisc
> E: USEC_INITIALIZED=11359074
> E: ID_MM_CANDIDATE=1
>
> The modem is now listed
>
> $ mmcli -L
>     /org/freedesktop/ModemManager1/Modem/0 [Sierra Wireless, Incorporated] Dell Wireless 5570 HSPA+ (42Mbps) Mobile Broadband Card
>
> but I cannot enable it
>
> $ mmcli -m 0 --enable
> error: couldn't enable the modem: 'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.WrongState: modem in failed state'
>
> may this be related to the missing SIM card? I am not going to add the
> card, but I would like to use the GPS of the WWAN. It this possible at
> all?
>

Yes, right now this is a limitation of ModemManager, the modem can
only be enabled if it has a valid SIM card, and setting up GPS
requires the modem to be enabled. I'll work on changing that once the
next stable MM release is out.


-- 
Aleksander
https://aleksander.es