Unable to connect to wwan on lenovo x1 carbon

[Marc Ramaekers]

network manager fails to establish a connection with the wwan on my lenovo x1 carbon.
I've disabled mbim using "options cdc_ncm prefer_mbim=0", so the driver indicated by network manager is cdc_acm.

When I try to make the connection, the process remains stuck at "Preparing to connect".
In the syslog I find the following (GSM connection failed: (32) Busy) :

May 21 20:11:24 x1 modem-manager[11921]: <debug> [1369167084.070302] [mm-at-serial-port.c:334] debug_log(): (ttyACM0): --> 'AT*ENAP?<CR>'
May 21 20:11:24 x1 modem-manager[11921]: <debug> [1369167084.084417] [mm-at-serial-port.c:334] debug_log(): (ttyACM0): <-- '<CR><LF>*ENAP:2,""<CR><LF>'
May 21 20:11:24 x1 modem-manager[11921]: <debug> [1369167084.085541] [mm-at-serial-port.c:334] debug_log(): (ttyACM0): <-- '<CR><LF>OK<CR><LF>'
May 21 20:11:24 x1 NetworkManager[11930]: <warn> GSM connection failed: (32) Busy
May 21 20:11:24 x1 NetworkManager[11930]: <info> (ttyACM0): device state change: prepare -> failed (reason 'modem-busy') [40 120 23]
May 21 20:11:24 x1 NetworkManager[11930]: <info> Marking connection 'Mobile Vikings' invalid.
May 21 20:11:24 x1 NetworkManager[11930]: <warn> Activation (ttyACM0) failed for connection 'Mobile Vikings'
May 21 20:11:24 x1 NetworkManager[11930]: <info> (ttyACM0): device state change: failed -> disconnected (reason 'none') [120 30 0]
May 21 20:11:24 x1 NetworkManager[11930]: <info> (ttyACM0): deactivating device (reason 'none') [0]

Connecting with wvdial allows to establish a connection, as can be seen from the log below.

--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
~[7f]}#@!}!}!} }=}#}%B#}%}(}"}'}"}!}$}%\}"}&} } } } }%}&anNBK{~
--> Carrier detected. Waiting for prompt.
~[7f]}#@!}!}"} }=}#}%B#}%}(}"}'}"}!}$}%\}"}&} } } } }%}&anNBx!~
--> PPP negotiation detected.
--> Starting pppd at Thu May 23 05:40:08 2013
--> Pid of pppd: 18795
--> Using interface ppp0
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> local IP address 10.44.86.76
--> pppd: �[7f]
--> remote IP address 10.64.64.64
--> pppd: �[7f]
--> primary DNS address 217.72.230.1
--> pppd: �[7f]
--> secondary DNS address 217.72.230.129
--> pppd: �[7f]

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: network-manager 0.9.8.0-0ubuntu6
Uname: Linux 3.8.4-030804-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Thu May 23 05:31:16 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/sbin/NetworkManager
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-04-28 (25 days ago)
InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
IpRoute:
 default via 192.168.42.129 dev usb0 proto static
 169.254.0.0/16 dev usb0 scope link metric 1000
 192.168.24.0/24 dev vmnet1 proto kernel scope link src 192.168.24.1
 192.168.42.0/24 dev usb0 proto kernel scope link src 192.168.42.17 metric 1
 192.168.245.0/24 dev vmnet8 proto kernel scope link src 192.168.245.1
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 usb0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/8
 ttyACM0 gsm disconnected /org/freedesktop/NetworkManager/Devices/7
 wlan0 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.8.0 connected enabled enabled enabled enabled disabled

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[hamish cunningham (hamish-dcs)]

I have a similar problem on the X1 Carbon, running 12.04, trying to connect to a Vodafone contract mobile broadband

My symptoms are: mobile broadband is always disabled; to connect I first enable it, then click on the Vodafone connection to activate it. Most of the time it fails to connect. I do sometimes get a working connection, but in a minute or two it kicks me off.

Below what I get in syslog if I use nmcli to start the connection via
  nmcli -t con up id 'Vodafone Contract'

Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) starting connection 'Vodafone Contract'
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): device state change: disconnected -> prepare (reason 'none') [30 40 0]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) scheduled...
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) started...
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): device state change: prepare -> need-auth (reason 'none') [40 60 0]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) complete.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) scheduled...
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> disconnect failed: (32) The serial port is not open.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) started...
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Activation (ttyACM1) Stage 1 of 5 (Device Prepare) complete.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <warn> GSM connection failed: (32) Sending command failed: device is not enabled
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): device state change: prepare -> failed (reason 'unknown') [40 120 1]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Marking connection 'Vodafone Contract' invalid.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <warn> Activation (ttyACM1) failed.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): device state change: failed -> disconnected (reason 'none') [120 30 0]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> (ttyACM1): deactivating device (reason 'none') [0]
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: nm_system_iface_flush_routes: assertion `ifindex > 0' failed
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: nm_system_iface_flush_addresses: assertion `ifindex > 0' failed
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Policy set 'eduroam' (wlan0) as default for IPv4 routing and DNS.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> Policy set 'eduroam' (wlan0) as default for IPv4 routing and DNS.
Jun 6 11:00:03 hc-x1 NetworkManager[1016]: <info> disconnect failed: (32) The serial port is not open.

Any ideas?
Thanks,
Hamish

[Daniel Aleksandersen (da2x)]

I have the same problem as Hamish.

[Marc Ramaekers (marc-ramaekers)]

Hi,

I work around it for now using wvdial. But not very practical...

Marc

[Christian Weber (cw-k)]

Hi,

"options cdc_ncm prefer_mbim=N" works if you use a newer kernel. It's an option for the kernel module only available in kernels > 3.8.5 I think. Personally I use kernel 3.11.x from http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/current/ with Lubuntu.

Chris