[SOLVED] Mobile Broadband (G3 Modem) refuses to connect

mpdeimos · 2014-08-17 07:43:13

Hey,

Lately (I guess since the beginning of August), I can no longer connect with my laptop to G3 networks. My setup is NetworkManager + ModemManager (ppp) + Gnome Shell. All installed from regular arch repositories.
I've already spent several hours to fix this problem, including downgrading the networkmanager stack form 0.9.10 to 0.9.8 (which I have installed in August 2nd), but no difference (besides slightly other log messages). Also no difference if I enable/disable a PIN on the SIM card.

This is what I get in the journal log, when I want to start the connection with Gnome Network Manager (same with nmtui):

Aug 17 09:13:53 arch NetworkManager[299]: <warn> Failed to activate 'O2 connection': Connection 'O2 connection' is not available on the device ttyACM1 at this time.
Aug 17 09:13:53 arch gnome-session[640]: (gnome-shell:718): libnm-glib-WARNING **: Device activation failed: (32) Connection 'O2 connection' is not available on the device ttyACM1 at this time.

$ sudo systemctl status ModemManager.service

● ModemManager.service - Modem Manager
   Loaded: loaded (/usr/lib/systemd/system/ModemManager.service; enabled)
   Active: active (running) since Sun 2014-08-17 09:12:29 CEST; 24min ago
 Main PID: 300 (ModemManager)
   CGroup: /system.slice/ModemManager.service
           └─300 /usr/bin/ModemManager

Aug 17 09:12:28 arch ModemManager[300]: <info>  ModemManager (version 1.2.0) starting...
Aug 17 09:12:32 arch ModemManager[300]: <info>  Creating modem with plugin 'Ericsson MBM' and '6' ports
Aug 17 09:12:32 arch ModemManager[300]: <warn>  Could not grab port (usbmisc/cdc-wdm1): 'Cannot add port 'usbmisc/cdc-wdm1', unsupported'
Aug 17 09:12:32 arch ModemManager[300]: <warn>  Could not grab port (usbmisc/cdc-wdm0): 'Cannot add port 'usbmisc/cdc-wdm0', unsupported'
Aug 17 09:12:32 arch ModemManager[300]: <info>  Modem for device at '/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6' successfully created
Aug 17 09:12:32 arch ModemManager[300]: <warn>  Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:19.0': not supported by any plugin
Aug 17 09:12:32 arch ModemManager[300]: <warn>  Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:1c.1/0000:02:00.0': not supported by any plugin
Aug 17 09:12:32 arch ModemManager[300]: <warn>  couldn't load Supported Modes: 'Couldn't retrieve supported modes'
Aug 17 09:12:33 arch ModemManager[300]: <info>  Modem: state changed (unknown -> disabled)

This should be the the relevant section of
$ usb-devices

T:  Bus=02 Lev=02 Prnt=02 Port=05 Cnt=02 Dev#=  4 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=02(commc) Sub=00 Prot=00 MxPS=64 #Cfgs=  3
P:  Vendor=413c ProdID=818d Rev=00.00
S:  Manufacturer=Dell
S:  Product=DW5550
S:  SerialNumber=C42EB91AA596B460
C:  #Ifs=11 Cfg#= 1 Atr=e0 MxPwr=0mA
I:  If#= 0 Alt= 0 #EPs= 0 Cls=02(commc) Sub=08 Prot=00 Driver=(none)
I:  If#= 1 Alt= 0 #EPs= 1 Cls=02(commc) Sub=02 Prot=01 Driver=cdc_acm
/usr/bin/usb-devices: line 79: printf: a: invalid number
I:  If#= 0 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
I:  If#= 2 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
I:  If#= 3 Alt= 0 #EPs= 1 Cls=02(commc) Sub=02 Prot=01 Driver=cdc_acm
I:  If#= 4 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
I:  If#= 5 Alt= 0 #EPs= 1 Cls=02(commc) Sub=09 Prot=01 Driver=cdc_wdm
I:  If#= 6 Alt= 0 #EPs= 1 Cls=02(commc) Sub=0d Prot=00 Driver=cdc_ncm
I:  If#= 7 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=01 Driver=cdc_ncm
I:  If#= 8 Alt= 0 #EPs= 1 Cls=02(commc) Sub=09 Prot=01 Driver=cdc_wdm
I:  If#= 9 Alt= 0 #EPs= 1 Cls=02(commc) Sub=02 Prot=01 Driver=cdc_acm

$ uname -a

Linux arch 3.16.1-1-ARCH #1 SMP PREEMPT Thu Aug 14 07:40:19 CEST 2014 x86_64 GNU/Linux

If anyone has an idea where to investigate further, especially regarding the error message "Connection 'O2 connection' is not available on the device ttyACM1 at this time", please let me know.

Thanks in advance!

Last edited by mpdeimos (2014-08-17 19:04:29)

Rexilion · 2014-08-17 11:25:18

Did you also downgrade your kernel and/or modemmanager? If not, that would be an idea.

mpdeimos · 2014-08-17 19:03:58

Yea, downgraded the ModemManager as well. Not the kernel yet.

But further investigation revealed that wwan had been disabled in the nm state file (/var/lib/NetworkManager/NetworkManager.state).

[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=false
WimaxEnabled=true

Changing this back to WWANEnabled=true allows me to connect to g3.
However, I have no clue how this setting could have been changed or if it was working before w/o this setting?

Last edited by mpdeimos (2014-11-03 10:16:42)

Rexilion · 2014-08-18 05:48:50

Perhaps you accidentaly clicked it in the right click menu of nm-applet?

Could also be a bug though.

mpdeimos · 2014-08-18 06:04:48

Just discovered a setting regarding enablement of mobile broadband in the power settings. If I uncheck this one I can reproduce above problem.

I think I'll create an upstream ticket for gnome 3 regarding lack of usability. That I've re-enabled the modem w/ state file tells all

Arch Linux

#1 2014-08-17 07:43:13

[SOLVED] Mobile Broadband (G3 Modem) refuses to connect

#2 2014-08-17 11:25:18

Re: [SOLVED] Mobile Broadband (G3 Modem) refuses to connect

#3 2014-08-17 19:03:58

Re: [SOLVED] Mobile Broadband (G3 Modem) refuses to connect

#4 2014-08-18 05:48:50

Re: [SOLVED] Mobile Broadband (G3 Modem) refuses to connect

#5 2014-08-18 06:04:48

Re: [SOLVED] Mobile Broadband (G3 Modem) refuses to connect

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