modem-manager state doesn't match hardware state after suspend (not able to connect)

[Pauli]

After suspend/resume cycle USB 3G modem is in disconnected state. Modem-manager reports device state just changing between disconnecting and connected:

Sep 27 11:17:02 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (connected -> disconnecting)
Sep 27 11:17:02 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (disconnecting -> connected)

But I can make modem-manager to reset the complete state just by killing it.

Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> Caught signal 15, shutting down...
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (connected -> disconnecting)
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (disconnecting -> connected)
Sep 27 11:17:25 rantapallo modem-manager[1198]: disable_disconnect_done: (/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2): error disconnecting the modem while disabling: (5) The serial port is not open.
Sep 27 11:17:25 rantapallo modem-manager[1198]: (mm-generic-gsm.c:2285):disable: runtime check failed: (priv->cid == -1)
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (connected -> disabling)
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> WWAN now disabled by management service
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> (ttyUSB2) closing serial port...
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> (ttyUSB2) serial port closed
Sep 27 11:17:25 rantapallo modem-manager[1198]: <info> Modem /org/freedesktop/ModemManager/Modems/8: state changed (disabling -> disabled)
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> (ttyUSB0): device state change: disconnected -> unmanaged (reason 'removed') [30 10 36]
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> (ttyUSB0): cleaning up...
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> (ttyUSB0): taking down device.
Sep 27 11:17:25 rantapallo NetworkManager[1270]: nm_system_iface_set_up: assertion `ifindex > 0' failed
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> the modem manager disappeared
Sep 27 11:17:25 rantapallo dbus[729]: [system] Activating service name='org.freedesktop.ModemManager' (using servicehelper)
Sep 27 11:17:25 rantapallo modem-manager[8154]: <info> ModemManager (version 0.6.0.0) starting...
Sep 27 11:17:25 rantapallo modem-manager[8156]: <info> ModemManager (version 0.6.0.0) starting...
Sep 27 11:17:25 rantapallo dbus[729]: [system] Successfully activated service 'org.freedesktop.ModemManager'
Sep 27 11:17:25 rantapallo NetworkManager[1270]: <info> modem-manager is now available
*** plugin loading ***
*** Serial port opening spam ***
Sep 27 11:17:54 rantapallo modem-manager[8154]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (disabled -> enabling)
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> (ttyUSB2): using PDU mode for SMS
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabling -> enabled)
Sep 27 11:17:55 rantapallo NetworkManager[1270]: <info> WWAN now enabled by management service
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (enabled -> registered)
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> (ttyUSB0) opening serial port...
Sep 27 11:17:55 rantapallo modem-manager[8154]: <warn> (ttyUSB0): port attributes not fully set
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (registered -> connecting)
Sep 27 11:17:55 rantapallo modem-manager[8154]: <info> Modem /org/freedesktop/ModemManager/Modems/0: state changed (connecting -> connected)

To me it seems that modem-manager would just need to know about suspend/resume and how to close and reopen with completely clean state the modem.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: modemmanager 0.6.0.0.really-0ubuntu5
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Fri Sep 27 11:19:21 2013
InstallationDate: Installed on 2011-11-02 (695 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
MarkForUpload: True
SourcePackage: modemmanager
UpgradeStatus: Upgraded to raring on 2013-09-18 (8 days ago)

[Aleksander Morgado (aleksander-m)]

In ModemManager 1.x, the current power state of the modem is not assumed when the modem is enabled; i.e. we always re-check current power status before trying to power-up.

[Pauli (paniemin)]

Ok. So issue is most likely fixed in a newer release that haven't yet reached Ubuntu. For some reason even saucy is using 0.6.0 only. Maybe I should try to build the package from the newer source my self.