Desativar WWAN-modem por si só, Ubuntu 14.10, Lenovo T440s, Sierra Sem Fio EM7345 4G LTE

Question

Eu tenho a minha Lenovo há algum tempo e tentei encontrar soluções para o meu problema com a WWAN.

Eu posso ativar a WWAN através da GUI e do terminal e conectar-me através do meu provedor de rede. Mas, depois de algum tempo, a rede cai e o modem desativa seus autos. É a mesma rede que meu telefone usa e não há problema com isso.

Eu não consigo encontrar o log correto para descobrir com o problema é. Então, espero que haja alguém aqui que possa me ajudar ou ter algumas ideias sobre onde procurar o problema.

Eu tenho a seguinte saída do terminal que eu acho que poderia ser útil, tudo isso é quando o wwan está conectado à rede:

1. lsb_release -a:

   Distributor ID: Ubuntu
   Description: Ubuntu 14.10
   Release: 14.10
   Codename: utopic

2. uname -a:

   Linux cbobach-ThinkPad-T440s 3.16.0-031600-generic #201408031935 SMP Sun Aug 3 23:36:11 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

3. usb-devices:

   T: Bus=02 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#= 7 Spd=480 MxCh= 0
   D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
   P: Vendor=1199 ProdID=a001 Rev=17.29
   S: Manufacturer=Sierra Wireless Inc.
   S: Product=Sierra Wireless EM7345 4G LTE
   S: SerialNumber=013937001863610
   C: #Ifs= 4 Cfg#= 1 Atr=e0 MxPwr=100mA
   I: If#= 0 Alt= 1 #EPs= 1 Cls=02(commc) Sub=0e Prot=00 Driver=cdc_mbim
   I: If#= 1 Alt= 2 #EPs= 2 Cls=0a(data ) Sub=00 Prot=02 Driver=cdc_mbim
   I: If#= 2 Alt= 0 #EPs= 1 Cls=02(commc) Sub=02 Prot=01 Driver=cdc_acm
   I: If#= 3 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm

4. lista nmcli dev:

   GENERAL.DEVICE: cdc-wdm1
   GENERAL.TYPE: gsm
   GENERAL.VENDOR: --
   GENERAL.PRODUCT: --
   GENERAL.DRIVER: cdc_mbim, cdc_acm
   GENERAL.DRIVER-VERSION:
   GENERAL.FIRMWARE-VERSION:
   GENERAL.HWADDR: (unknown)
   GENERAL.STATE: 100 (connected)
   GENERAL.REASON: 0 (No reason given)
   GENERAL.UDI: /org/freedesktop/ModemManager1/Modem/54
   GENERAL.IP-IFACE: wwan0
   GENERAL.NM-MANAGED: yes
   GENERAL.AUTOCONNECT: yes
   GENERAL.FIRMWARE-MISSING: no
   GENERAL.CONNECTION: /org/freedesktop/NetworkManager/ActiveConnection/15
   CAPABILITIES.CARRIER-DETECT: no
   CAPABILITIES.SPEED: unknown
   CONNECTIONS.AVAILABLE-CONNECTION-PATHS: /org/freedesktop/NetworkManager/Settings/{2}
   CONNECTIONS.AVAILABLE-CONNECTIONS[1]: d710afac-2f41-4778-9861-83cc4a272b31 | 3 Bredbånd (standard)
   IP4.ADDRESS[1]: ip = 109.56.85.37/24, gw = 0.0.0.0
   IP4.DNS[1]: 95.209.200.69
   IP4.DNS[2]: 95.209.200.70

5. ifconfig:

   wwan0 Link encap:Ethernet HWaddr da:5a:85:51:96:5b
   inet addr:109.56.32.124 Bcast:109.56.32.255 Mask:255.255.255.0
   inet6 addr: ::d85a:85ff:fe51:965b/64 Scope:Global
   inet6 addr: ::adf4:9e24:ff95:f33/64 Scope:Global
   inet6 addr: fe80::d85a:85ff:fe51:965b/64 Scope:Link
   UP BROADCAST RUNNING NOARP MULTICAST MTU:1500 Metric:1
   RX packets:1 errors:0 dropped:0 overruns:0 frame:0
   TX packets:49 errors:0 dropped:0 overruns:0 carrier:0
   collisions:0 txqueuelen:1000
   RX bytes:88 (88.0 B) TX bytes:8045 (8.0 KB)

6. syslog:

   https://dl.dropboxusercontent.com/u/14778527/syslog

Por favor, escreva se você acha que algo poderia esclarecer o problema.

    

Answer 1

Eu tive o mesmo problema no Ubuntu 14.04 em um Lenovo Thinkpad W541 com um Sierra sem fio EM7345 4G LTE com firmware: FIH7160_V1.2_WW_01.1415.07

Eu li no firmware EM7345 1.1 Changelog que o problema de desconexões aleatórias e falha na reconexão foi corrigido em 1.2. Posso confirmar que o problema ainda persiste em 1.2 e não há atualizações para o Lenovo W541.

A solução é cortar a energia do modem integrado sem fio Sierra EM7345 (que é tecnicamente um dispositivo USB), para forçar uma reinicialização total. Eu tentei absolutamente todos os reinícios suaves possíveis até me deparar com a possibilidade de cortar a energia de uma porta USB completamente sem desligar meu laptop.

Siga estas etapas:

1. descubra o caminho de ônibus do seu modem Sierra Wireless EM7345 com:

$ lsusb -t

pesquise por "cdc" na saída, eis o seguinte:

/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/3p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 5000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/15p, 480M
    |__ Port 5: Dev 2, If 0, Class=Chip/SmartCard, Driver=usbfs, 12M
    |__ Port 6: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 6: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 6: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 7: Dev 4, If 0, Class=Vendor Specific Class, Driver=, 12M
    |__ Port 10: Dev 14, If 0, Class=Communications, Driver=cdc_mbim, 480M
    |__ Port 10: Dev 14, If 1, Class=CDC Data, Driver=cdc_mbim, 480M
    |__ Port 10: Dev 14, If 2, Class=Communications, Driver=cdc_acm, 480M
    |__ Port 10: Dev 14, If 3, Class=CDC Data, Driver=cdc_acm, 480M
    |__ Port 12: Dev 7, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 12: Dev 7, If 1, Class=Video, Driver=uvcvideo, 480M

aqui você pode ver que no Bus 01 Port 10 existe um dispositivo cdc (o modem Sierra Wireless EM7345), isso significa que o caminho é: 1-10

2. envie o modem para uma reinicialização suave:

$ sudo modem-cmd /dev/ttyACM0 AT+CFUN=16

não haverá saída se for bem sucedida. este comando não se fecha, então CTRL + C o mata

3. desligue a energia do modem (você precisa ser root):

$ echo '1-10' |sudo tee /sys/bus/usb/drivers/usb/unbind

espere alguns segundos até que o dispositivo seja desligado, quando não houver atividade em / var / log / syslog

4. ligue novamente o modem:

$ echo '1-10' |sudo tee /sys/bus/usb/drivers/usb/bind

Depois disso, o modem demorará 1..2 segundos para ser iniciado, quando não houver atividade no syslog

5. Marque Ativar Banda larga móvel no menu da bandeja do NetworkManagers, clique com o botão direito do mouse no menu.

6. conectar-se à sua conexão de banda larga móvel escolhida, como de costume

Ou use este script:

Eu escrevi um pequeno script bash para fazer tudo isso, que eu começo com o gksudo:

#!/bin/bash
# run this with root!!
# if this doesnt work, check if the bus path is correct with:
# lsusb -t (search for cdc)

modem-cmd /dev/ttyACM0 AT+CFUN=16 &
sleep 1
killall modem-cmd
echo '1-10' |tee /sys/bus/usb/drivers/usb/unbind
sleep 2
echo '1-10' |tee /sys/bus/usb/drivers/usb/bind

Anexo

aqui está meu syslog para fins de SEO:

Every time I suspend my laptop or disconnect the Mobile Broadband connection or when the Mobile Broadband connection dies by itself (happens sometimes):
Also, the modem sometimes disconnects on its own:
Nov  6 02:19:44 L4 avahi-daemon[1075]: Interface wwan0.IPv6 no longer relevant for mDNS.
Nov  6 02:19:44 L4 avahi-daemon[1075]: Leaving mDNS multicast group on interface wwan0.IPv6 with address fe80::d8a3:4fff:fec9:d56e.
Nov  6 02:19:44 L4 avahi-daemon[1075]: Interface wwan0.IPv4 no longer relevant for mDNS.
Nov  6 02:19:44 L4 avahi-daemon[1075]: Leaving mDNS multicast group on interface wwan0.IPv4 with address 10.144.34.75.
Nov  6 02:19:44 L4 kernel: [258309.296360] usb 1-10: USB disconnect, device number 13
Nov  6 02:19:44 L4 kernel: [258309.296416] cdc_mbim 1-10:1.0 wwan0: unregister 'cdc_mbim' usb-0000:00:14.0-10, CDC MBIM
Nov  6 02:19:44 L4 NetworkManager[1024]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.0/net/wwan0, iface: wwan0)
Nov  6 02:19:44 L4 ModemManager[982]: <info>  (net/wwan0): released by modem /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10
Nov  6 02:19:44 L4 avahi-daemon[1075]: IP_DROP_MEMBERSHIP failed: No such device
Nov  6 02:19:44 L4 avahi-daemon[1075]: Withdrawing address record for fe80::d8a3:4fff:fec9:d56e on wwan0.
Nov  6 02:19:44 L4 avahi-daemon[1075]: Withdrawing address record for 10.144.34.75 on wwan0.
Nov  6 02:19:44 L4 avahi-daemon[1075]: Withdrawing workstation service for wwan0.
Nov  6 02:19:44 L4 ModemManager[982]: [/dev/cdc-wdm0] unexpected port hangup!
Nov  6 02:19:44 L4 ModemManager[982]: <info>  (usbmisc/cdc-wdm0): released by modem /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10
Nov  6 02:19:44 L4 kernel: [258309.319654] cdc_acm 1-10:1.2: failed to set dtr/rts
Nov  6 02:19:44 L4 ModemManager[982]: <info>  (tty/ttyACM0): released by modem /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> (cdc-wdm0): device state change: activated -> unmanaged (reason 'removed') [100 10 36]
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> (cdc-wdm0): deactivating device (reason 'removed') [36]
Nov  6 02:19:44 L4 NetworkManager[1024]: <warn> (12) failed to find interface name for index
Nov  6 02:19:44 L4 NetworkManager[1024]: nm_system_iface_flush_routes: assertion 'iface != NULL' failed
Nov  6 02:19:44 L4 NetworkManager[1024]: <warn> (12) failed to find interface name for index
Nov  6 02:19:44 L4 NetworkManager[1024]: <warn> (12) failed to find interface name for index
Nov  6 02:19:44 L4 NetworkManager[1024]: nm_system_iface_flush_routes: assertion 'iface != NULL' failed
Nov  6 02:19:44 L4 NetworkManager[1024]: <warn> (12) failed to find interface name for index
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> Writing DNS information to /sbin/resolvconf
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> (cdc-wdm0): cleaning up...
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> (cdc-wdm0): taking down device.
Nov  6 02:19:44 L4 NetworkManager[1024]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
Nov  6 02:19:44 L4 dbus[956]: [system] Activating service name='org.freedesktop.nm_dispatcher' (using servicehelper)
Nov  6 02:19:44 L4 NetworkManager[1024]: <warn> (cdc-wdm0) failed to disconnect modem: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.ModemManager1.Modem.Simple' on object at path /org/freedesktop/ModemManager1/Modem/3
Nov  6 02:19:44 L4 dbus[956]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Nov  6 02:19:44 L4 dbus[956]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Nov  6 02:19:45 L4 kernel: [258309.563672] usb 1-10: new high-speed USB device number 14 using xhci_hcd
Nov  6 02:19:45 L4 kernel: [258309.699555] usb 1-10: New USB device found, idVendor=1199, idProduct=a001
Nov  6 02:19:45 L4 kernel: [258309.699558] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov  6 02:19:45 L4 kernel: [258309.699559] usb 1-10: Product: Sierra Wireless EM7345 4G LTE
Nov  6 02:19:45 L4 kernel: [258309.699560] usb 1-10: Manufacturer: Sierra Wireless Inc.
Nov  6 02:19:45 L4 kernel: [258309.699561] usb 1-10: SerialNumber: 013937005331614
Nov  6 02:19:45 L4 kernel: [258309.720394] cdc_mbim 1-10:1.0: setting rx_max = 16384
Nov  6 02:19:45 L4 kernel: [258309.720903] cdc_mbim 1-10:1.0: cdc-wdm0: USB WDM device
Nov  6 02:19:45 L4 kernel: [258309.721035] cdc_mbim 1-10:1.0 wwan0: register 'cdc_mbim' at usb-0000:00:14.0-10, CDC MBIM, da:a3:4f:c9:d5:6e
Nov  6 02:19:45 L4 kernel: [258309.721963] cdc_acm 1-10:1.2: ttyACM0: USB ACM device
Nov  6 02:19:45 L4 mtp-probe: checking bus 1, device 14: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-10"
Nov  6 02:19:45 L4 mtp-probe: bus: 1, device: 14 was not an MTP device
Nov  6 02:19:45 L4 NetworkManager[1024]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.0/net/wwan0, iface: wwan0)
Nov  6 02:19:45 L4 NetworkManager[1024]:    SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10:1.0/net/wwan0, iface: wwan0): no ifupdown configuration found.
Nov  6 02:19:46 L4 ntpd[23035]: Deleting interface #5 wwan0, fe80::d8a3:4fff:fec9:d56e#123, interface stats: received=0, sent=0, dropped=0, active_time=2433 secs
Nov  6 02:19:46 L4 ntpd[23035]: Deleting interface #3 wwan0, 10.144.34.75#123, interface stats: received=144, sent=144, dropped=0, active_time=2433 secs
Nov  6 02:19:46 L4 ntpd[23035]: 91.189.94.4 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 212.7.1.132 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 193.40.0.5 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 5.101.116.20 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 46.22.223.220 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: peers refreshed
Nov  6 02:19:48 L4 ModemManager[982]: [/dev/cdc-wdm0] Queried max control message size: 512
Nov  6 02:19:48 L4 ModemManager[982]: <info>  Creating modem with plugin 'Generic' and '3' ports
Nov  6 02:19:48 L4 ModemManager[982]: <info>  Modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-10' successfully created
Nov  6 02:19:48 L4 ModemManager[982]: [/dev/cdc-wdm0] Queried max control message size: 512
Nov  6 02:19:49 L4 ModemManager[982]: <info>  Modem: state changed (unknown -> disabled)
Nov  6 02:19:49 L4 NetworkManager[1024]: <warn> (cdc-wdm0): failed to look up interface index
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> WWAN now disabled by management service
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): new Broadband device (driver: 'cdc_mbim, cdc_acm' ifindex: 0)
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): exported as /org/freedesktop/NetworkManager/Devices/6
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): deactivating device (reason 'managed') [2]
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> NetworkManager state is now DISCONNECTED
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): device state change: unavailable -> disconnected (reason 'none') [20 30 0]
Nov  6 02:19:46 L4 ntpd[23035]: Deleting interface #5 wwan0, fe80::d8a3:4fff:fec9:d56e#123, interface stats: received=0, sent=0, dropped=0, active_time=2433 secs
Nov  6 02:19:46 L4 ntpd[23035]: Deleting interface #3 wwan0, 10.144.34.75#123, interface stats: received=144, sent=144, dropped=0, active_time=2433 secs
Nov  6 02:19:46 L4 ntpd[23035]: 91.189.94.4 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 212.7.1.132 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 193.40.0.5 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 5.101.116.20 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: 46.22.223.220 interface 10.144.34.75 -> (none)
Nov  6 02:19:46 L4 ntpd[23035]: peers refreshed
Nov  6 02:19:48 L4 ModemManager[982]: [/dev/cdc-wdm0] Queried max control message size: 512
Nov  6 02:19:48 L4 ModemManager[982]: <info>  Creating modem with plugin 'Generic' and '3' ports
Nov  6 02:19:48 L4 ModemManager[982]: <info>  Modem for device at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-10' successfully created
Nov  6 02:19:48 L4 ModemManager[982]: [/dev/cdc-wdm0] Queried max control message size: 512
Nov  6 02:19:49 L4 ModemManager[982]: <info>  Modem: state changed (unknown -> disabled)
Nov  6 02:19:49 L4 NetworkManager[1024]: <warn> (cdc-wdm0): failed to look up interface index
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> WWAN now disabled by management service
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): new Broadband device (driver: 'cdc_mbim, cdc_acm' ifindex: 0)
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): exported as /org/freedesktop/NetworkManager/Devices/6
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): deactivating device (reason 'managed') [2]
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> NetworkManager state is now DISCONNECTED
Nov  6 02:19:49 L4 NetworkManager[1024]: <info> (cdc-wdm0): device state change: unavailable -> disconnected (reason 'none') [20 30 0]



after that I can no longer reconnect:
Aug 26 16:45:03 L4 NetworkManager[965]: <info> Activation (cdc-wdm1) starting connection 'EE Elisa Any'
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Aug 26 16:45:03 L4 NetworkManager[965]: <info> Activation (cdc-wdm1) Stage 1 of 5 (Device Prepare) scheduled...
Aug 26 16:45:03 L4 NetworkManager[965]: <info> Activation (cdc-wdm1) Stage 1 of 5 (Device Prepare) started...
Aug 26 16:45:03 L4 NetworkManager[965]: <info> Activation (cdc-wdm1) Stage 1 of 5 (Device Prepare) complete.
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Simple connect started...
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Simple connect state (4/8): Wait to get fully enabled
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Simple connect state (5/8): Register
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Simple connect state (6/8): Bearer
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Simple connect state (7/8): Connect
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Modem /org/freedesktop/ModemManager1/Modem/12: state changed (registered -> connecting)
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1) modem state changed, 'registered' --> 'connecting' (reason: user-requested)
Aug 26 16:45:03 L4 ModemManager[923]: <info>  Modem /org/freedesktop/ModemManager1/Modem/12: state changed (connecting -> registered)
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1) modem state changed, 'connecting' --> 'registered' (reason: user-requested)
Aug 26 16:45:03 L4 NetworkManager[965]: <warn> (cdc-wdm1) failed to connect modem: Failure
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1): device state change: prepare -> failed (reason 'unknown') [40 120 1]
Aug 26 16:45:03 L4 NetworkManager[965]: <info> Marking connection 'EE Elisa Any' invalid.
Aug 26 16:45:03 L4 NetworkManager[965]: <warn> Activation (cdc-wdm1) failed for connection 'EE Elisa Any'
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1): device state change: failed -> disconnected (reason 'none') [120 30 0]
Aug 26 16:45:03 L4 NetworkManager[965]: <info> (cdc-wdm1): deactivating device (reason 'none') [0]

    

Answer 2

Eu tive o mesmo problema com o Sierra Wireless MC7710. Eles ocorreram depois que eu desativei o PIN porque fiquei incomodado quando fui perguntado por chaveiro e PIN em cada login. Parece haver algo errado com os direitos do grupo. No meu caso, "dialout" estava faltando em "grupos" e eu adicionei

sudo usermod -a -G dip,dialout $(whoami)

como descrito aqui:

link

Depois de reiniciar o modem funcionou desde então.

Não relacionado a este problema Eu enfrentei mau comportamento do Network Manager nos últimos anos, às vezes a opção "connect" está faltando na GUI e está de volta após 1 ou 2 reinicializações. Recentemente, também encontrei uma solução para isso, por isso, se você tiver problemas com o seu modem, por vezes, não aparecer no indicador de rede isso sempre vale a pena tentar : Quando o Network Manager está faltando a opção de conectar Existem duas opções:

Basta reiniciar o Network Manager, em 16.04 isso funciona com:

sudo systemctl restart NetworkManager

Use o gerenciador de rede do KDE e conecte-se a ele (isso também tem a vantagem de poder criar um hotspot).

1. Para instalar o gerenciador de Netwok do KDE no Ubuntu (junto com o padrão Netwok):

sudo apt-get update; sudo apt-get install plasma-nm

2. Corrigindo falta de entrada no Unity's Dash: "kde5-nm-connection-editor" está agora instalado, mas devido a um bug não é mostrado no Unity’s Dash. Para corrigir isso: Abra o Terminal e digite:

sudo gedit /usr/share/applications/kde5-nm-connection-editor.desktop

Em seguida, comente a linha que contém NoDisplay = true adicionando # antes e salve as alterações.

3. Agora pesquise e abra via Dash: kde5-nm-connection-editor