USB Modem not displayed in network manager

[Paul]

4G USB WAN modem will not display in network manager, but is fully detected by the kernel and is displayed in ip link

journal;
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: new high-speed USB device number 5 using xhci_hcd
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: config 1 has an invalid interface number: 7 but max is 3
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: config 1 has no interface number 2
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: New USB device found, idVendor=1199, idProduct=68a3
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: New USB device strings: Mfr=3, Product=2, SerialNumber=4
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: Product: AC760S
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: Manufacturer: Sierra Wireless, Incorporated
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: SerialNumber: 359822042204515
Apr 27 10:56:44 Paul-HP-Laptop kernel: sierra 5-2:1.0: Sierra USB modem converter detected
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: Sierra USB modem converter now attached to ttyUSB0
Apr 27 10:56:44 Paul-HP-Laptop kernel: sierra 5-2:1.1: Sierra USB modem converter detected
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: Sierra USB modem converter now attached to ttyUSB1
Apr 27 10:56:44 Paul-HP-Laptop kernel: sierra 5-2:1.3: Sierra USB modem converter detected
Apr 27 10:56:44 Paul-HP-Laptop kernel: usb 5-2: Sierra USB modem converter now attached to ttyUSB2
Apr 27 10:56:44 Paul-HP-Laptop kernel: sierra_net 5-2:1.7 wwan0: register 'sierra_net' at usb-0000:00:10.0-2, Sierra Wireless USB-to-WWAN Modem, ce:6b:97:53:02:07
Apr 27 10:56:44 Paul-HP-Laptop mtp-probe[19472]: checking bus 5, device 5: "/sys/devices/pci0000:00/0000:00:10.0/usb5/5-2"
Apr 27 10:56:44 Paul-HP-Laptop mtp-probe[19472]: bus: 5, device: 5 was not an MTP device
Apr 27 10:56:44 Paul-HP-Laptop kernel: sierra_net 5-2:1.7 wwp0s16f0u2i7: renamed from wwan0
Apr 27 10:56:44 Paul-HP-Laptop NetworkManager[898]: <info> [1493254604.4733] devices added (path: /sys/devices/pci0000:00/0000:00:10.0/usb5/5-2/5-2:1.7/net/wwp0s16f0u2i7, iface: wwp0s16f0u2i7
Apr 27 10:56:44 Paul-HP-Laptop NetworkManager[898]: <info> [1493254604.4734] device added (path: /sys/devices/pci0000:00/0000:00:10.0/usb5/5-2/5-2:1.7/net/wwp0s16f0u2i7, iface: wwp0s16f0u2i7)
Apr 27 10:56:45 Paul-HP-Laptop ModemManager[846]: <warn> (ttyUSB1): port attributes not fully set
Apr 27 10:56:45 Paul-HP-Laptop ModemManager[846]: <warn> (ttyUSB0): port attributes not fully set
Apr 27 10:56:45 Paul-HP-Laptop ModemManager[846]: <warn> (ttyUSB2): port attributes not fully set
Apr 27 10:56:57 Paul-HP-Laptop ModemManager[846]: <info> Creating modem with plugin 'Sierra (legacy)' and '4' ports
Apr 27 10:56:57 Paul-HP-Laptop ModemManager[846]: <warn> Could not grab port (tty/ttyUSB1): 'Cannot add port 'tty/ttyUSB1', unhandled serial type'
Apr 27 10:56:57 Paul-HP-Laptop ModemManager[846]: <warn> Could not grab port (tty/ttyUSB0): 'Cannot add port 'tty/ttyUSB0', unhandled serial type'
Apr 27 10:56:57 Paul-HP-Laptop ModemManager[846]: <warn> (ttyUSB2): port attributes not fully set
Apr 27 10:56:57 Paul-HP-Laptop ModemManager[846]: <info> Modem for device at '/sys/devices/pci0000:00/0000:00:10.0/usb5/5-2' successfully created
Apr 27 10:57:01 Paul-HP-Laptop ModemManager[846]: <info> Modem: state changed (unknown -> disabled)
Apr 27 10:57:01 Paul-HP-Laptop NetworkManager[898]: <info> [1493254621.9962] (ttyUSB2): modem state changed, 'disabled' --> 'enabling' (reason: user preference)
Apr 27 10:57:02 Paul-HP-Laptop NetworkManager[898]: <info> [1493254622.0002] manager: (ttyUSB2): new Broadband device (/org/freedesktop/NetworkManager/Devices/5)
Apr 27 10:57:02 Paul-HP-Laptop NetworkManager[898]: <info> [1493254622.0043] device (ttyUSB2): state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Apr 27 10:57:02 Paul-HP-Laptop NetworkManager[898]: <info> [1493254622.0065] device (ttyUSB2): modem state 'enabling'
Apr 27 10:57:02 Paul-HP-Laptop NetworkManager[898]: <info> [1493254622.0080] device (ttyUSB2): state change: unavailable -> disconnected (reason 'none') [20 30 0]
Apr 27 10:57:02 Paul-HP-Laptop ModemManager[846]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (disabled -> enabling)
Apr 27 10:57:02 Paul-HP-Laptop ModemManager[846]: <warn> (ttyUSB2): port attributes not fully set
Apr 27 10:57:05 Paul-HP-Laptop ModemManager[846]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: 3GPP Registration state changed (unknown -> registering)
Apr 27 10:57:05 Paul-HP-Laptop ModemManager[846]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: 3GPP Registration state changed (registering -> home)
Apr 27 10:57:05 Paul-HP-Laptop ModemManager[846]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (enabling -> registered)
Apr 27 10:57:06 Paul-HP-Laptop NetworkManager[898]: <info> [1493254626.0016] (ttyUSB2): modem state changed, 'enabling' --> 'registered' (reason: user-requested)

ip link;
6: wwp0s16f0u2i7: <BROADCAST,MULTICAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether ce:6b:97:53:02:07 brd ff:ff:ff:ff:ff:ff

[Carlo Lobrano (c-lobrano)]

It seems that both ModemManager and NetworkManager are doing the right thing

    Apr 27 10:57:05 Paul-HP-Laptop ModemManager[846]: <info> Modem /org/freedesktop/ModemManager1/Modem/1: state changed (enabling -> registered)
    Apr 27 10:57:06 Paul-HP-Laptop NetworkManager[898]: <info> [1493254626.0016] (ttyUSB2): modem state changed, 'enabling' --> 'registered' (reason: user-requested)

If you're able to reproduce the issue, could you please enable debug logs in both NetworkManager and ModemManager?

Please do the following (I know, it's a bit long, sorry for that)

$ sudo systemctl stop NetworkManager
$ sudo systemctl stop ModemManager

$ sudo NetworkManager --log-level=DEBUG --debug | tee $HOME/network-manager.logs

then open a new shell and run:

$ sudo ModemManager -d | tee $HOME/modem-manager.logs

and then attach the two log file in your home directory

[Carlo Lobrano (c-lobrano)]

Marking this as incomplete since some information are missing

[Launchpad Janitor (janitor)]

[Expired for plasma-nm (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for modemmanager (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for network-manager (Ubuntu) because there has been no activity for 60 days.]