After upgrading to modemmanager 0.5.1.97 I was unable to connect with my Option HSDPA modem. The connection attempt fails after having sent an AT_OWCTI? command. I did a downgrade to modemmanager 0.5.1.96 and it worked again.
Please find attached the debug output (syslog snippets) of Network-Manager and Modem-Manager for modemmanager 0.5.1.97 (unsuccessful connect, file mm_and_nm_debug_does_not_work.log) and modemmanager 0.5.1.96 (successful connect, file: mm_and_nm_debug_works.log). Please note that I filed the bug report with modemmanager 0.5.1.96 installed
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: modemmanager 0.5.1.96-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
Uname: Linux 3.2.0-18-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
Date: Mon Mar 12 19:51:43 2012
EcryptfsInUse: Yes
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120201.1)
ProcEnviron:
LANGUAGE=
TERM=xterm
PATH=(custom, no user)
LANG=de_DE.UTF-8
SHELL=/bin/bash
SourcePackage: modemmanager
UpgradeStatus: No upgrade log present (probably fresh install)
The real issue comes with the fact that successful connections are reported via unsolicited "_OWANCALL" messages like this:
(ttyHS2): <-- '_OWANCALL: 2, 1<CR><LF>'
These messages don't come prefixed with <CR><LF>, and therefore the new echo removal mechanism in MM 0.5.1.97 gets rid of those.
I will fix it to avoid using the echo removal in the Option & HSO plugins.