"Enable Mobile Broadband" sometimes fails to appear in indicator menu -- LG GT540

[palimmo]

I use my Mobile LG GT540 and Ubuntu 12.04 64 bit to connect in 3G mode. But it works randomly.
Really often I can't find the voice "Enable Mobile Broadband" in the nm-applet menu and unplug and replug my mobile doesn't work most of the times.
Hence, I need to restart Ubuntu (often I need to restart it several times before the connection is available).

I've tried to launch Ubuntu and THEN plug the mobile, but that doesn't give me the certainty to have a working connection.
Kill and relaunch nm-applet gives the same result.

It seems that sometimes the modem of my mobile is immediately well recognised, sometimes not. That means a lot of time wasting...

Thanks!

~$ lsusb
Bus 002 Device 002: ID 1004:618e LG Electronics, Inc. Ally/Optimus One/Vortex (debug mode)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
Uname: Linux 3.2.0-31-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Date: Sat Sep 8 16:57:12 2012
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
IpRoute:
 default via 10.64.64.64 dev ppp0 proto static
 10.64.64.64 dev ppp0 proto kernel scope link src 217.201.242.72
 169.254.0.0/16 dev ppp0 scope link metric 1000
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=false
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2012-04-19T09:54:44.803690
nmcli-con:
 NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH
 CoopVoce 7925515c-f956-4727-8ae6-a81fd5d58488 gsm 1347116180 Sat 08 Sep 2012 04:56:20 PM CEST yes no /org/freedesktop/NetworkManager/Settings/1
 Default 38bbdf76-7511-4741-b95c-caf63c78d3bc 802-11-wireless 1345388068 Sun 19 Aug 2012 04:54:28 PM CEST yes no /org/freedesktop/NetworkManager/Settings/0
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 ttyUSB0 gsm connected /org/freedesktop/NetworkManager/Devices/2
 wlan0 802-11-wireless unavailable /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.4.0 connected enabled enabled disabled enabled enabled

[Thomas Hood (jdthood)]

At https://live.gnome.org/NetworkManager/MobileBroadband I don't see the LG GT540 listed. Do you have reason to believe that your modem is supported by NM et al?

[palimmo (palimmo)]

I don't know. But sometimes it works.
I'm just trying to find a way to connect always without problems.

[palimmo (palimmo)]

Since yesterday, I have discovered something really interesting.
After 2 minutes that the mobile is plugged in, the voice "Enable Mobile Broadband" appears and I can surf the web.
Hence the question is:
why should I wait 2-3 minutes (not an eternity... but quite a long time) before the connection is fully recognised and available?

Thanks

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.