Option HSDPA Modem does not work

Bug #953294 reported by jsiebold
This bug affects 1 person
Affects Status Importance Assigned to Milestone
modemmanager (Ubuntu)
Fix Released
Aleksander Morgado

Bug Description

After upgrading to modemmanager 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 and it worked again.
Please find attached the debug output (syslog snippets) of Network-Manager and Modem-Manager for modemmanager (unsuccessful connect, file mm_and_nm_debug_does_not_work.log) and modemmanager (successful connect, file: mm_and_nm_debug_works.log). Please note that I filed the bug report with modemmanager installed

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: modemmanager
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)
 PATH=(custom, no user)
SourcePackage: modemmanager
UpgradeStatus: No upgrade log present (probably fresh install)

Revision history for this message
jsiebold (jsi150) wrote :
Revision history for this message
Aleksander Morgado (aleksander-m) wrote :

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 gets rid of those.

I will fix it to avoid using the echo removal in the Option & HSO plugins.

Changed in modemmanager (Ubuntu):
status: New → Confirmed
assignee: nobody → Aleksander Morgado (aleksander-m)
Revision history for this message
Aleksander Morgado (aleksander-m) wrote :

Fixed in upstream MM_05 and master branches; will make it to the next stable MM 0.5 release.

Changed in modemmanager (Ubuntu):
status: Confirmed → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package modemmanager -

modemmanager ( precise; urgency=low

  * New upstream bugfix release (stable release 0.5.2).
    - hso: disable echo removal (LP: #953294)
    - gsm: retry sending SMS in PDU mode if text fails and PDU is supported
 -- Mathieu Trudel-Lapierre <email address hidden> Wed, 14 Mar 2012 12:19:08 -0400

Changed in modemmanager (Ubuntu):
status: Fix Committed → Fix Released
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