Public bug reported:
The UMTS modem included in the T440s directly hangs up after connecting.
Mar 18 15:44:37 kallisto pppd[10835]: Connect: ppp0 <--> /dev/ttyACM1
Mar 18 15:44:37 kallisto pppd[10835]: CHAP authentication succeeded:
Congratulations!
Mar 18 15:44:37 kallisto pppd[10835]: CHAP authentication succeeded
Mar 18 15:44:37 kallisto NetworkManager[1388]: SCPlugin-Ifupdown: devices
added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Mar 18 15:44:37 kallisto NetworkManager[1388]: SCPlugin-Ifupdown: device
added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown
configuration found.
Mar 18 15:44:37 kallisto NetworkManager[1388]: <warn>
/sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Mar 18 15:44:37 kallisto ModemManager[1267]: <info> Modem
/org/freedesktop/ModemManager1/Modem/7: signal quality updated (80)
Mar 18 15:44:38 kallisto pppd[10835]: Modem hangup
Mar 18 15:44:38 kallisto pppd[10835]: Connection terminated.
Mar 18 15:44:38 kallisto kernel: [56636.756334] usb 2-4: USB disconnect, device
number 25
Mar 18 15:44:38 kallisto kernel: [56636.758262] cdc_ncm 2-4:1.6 wwan0:
unregister 'cdc_ncm' usb-0000:00:14.0-4, Mobile Broadband Network Device
It seems that an additional Entry is in 77-mm-ericcson-mbm.rules is
needed (upstream commit bd5cecb577b7e47ff1f84f9f476fb0a69374c798) is
needed:
ATTRS{idVendor}=="0bdb", ATTRS{idProduct}=="193e",
ENV{ID_MM_ERICSSON_MBM}="1"
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: modemmanager 1.0.0-2ubuntu1 [modified:
lib/udev/rules.d/77-mm-ericsson-mbm.rules]
Uname: Linux 3.14.0-rc7aha+ x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Mar 18 15:46:43 2014
EcryptfsInUse: Yes
SourcePackage: modemmanager
UpgradeStatus: Upgraded to trusty on 2014-03-17 (0 days ago)
** Affects: modemmanager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug trusty
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https://bugs.launchpad.net/bugs/1294158
Title:
UMTS Modem in T440s does not work, please update 77-mm-ericsson-
mbm.rules
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