Public bug reported:
After upgrading the firmware on my Huawei E220 modem to 11.117.10.02.00
I can't connect using NetworkManager. Before the firmware upgrade it was
connecting without problems.
My manual pppd scripts still connect without problems.
The problem seems to be that the modem hangs when /dev/ttyUSB1 is being
probed by ModemManager. The device used to connect the modem is
/dev/ttyUSB0.
If I start the command 'cat /dev/ttyUSB1' in a terminal before
ModemManager starts its probing everything works fine. It seems like the
connection to /dev/ttyUSB1 is blocked by the cat command and the probing
of ttyUSB1 fails.
I've attached a log file of a failed connection with ModemManager
started in debug mode: "ModemManager Failure On E220 Connect Full (From
modem attached).txt".
I will also attach a log file of a successful connection (with 'cat
/dev/ttyUSB1' running in a terminal).
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: modemmanager 0.5-1ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic-pae 3.0.13
Uname: Linux 3.0.0-15-generic-pae i686
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Wed Feb 15 15:05:49 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, user)
LANG=sv_SE.utf8
SHELL=/bin/bash
SourcePackage: modemmanager
UpgradeStatus: Upgraded to oneiric on 2011-10-18 (120 days ago)
** Affects: modemmanager (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 oneiric
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https://bugs.launchpad.net/bugs/932824
Title:
ModemManager hangs Huawei E220 Modem when probing ttyUSB1
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