Comment 3 for bug 737011

translated into english (google):

Hi,

[Situation]
I use a dial up connection via mobile phone (cell phone modem) as Internet connection.
Built by Gnome-PPP (gnome-ppp), because the modem manager (modem manger) since Natty is no longer able to reliably detect my modem and connect accurately and reliable.

The Network Manager in recent versions (and current) does not recognize any of Gnome-PPP (package gnome-ppp) established connections.
This causes different side effects in the following packages:

- Update-manager:
[Expected] Download and display the change log of the selected update
[Bug] Change-Log of changes on upgrades can not be downloaded because the response of the network manager does not indicate a current network connection.
However, the actual updates are downloaded and installed correctly.

- Evolution:
[Expected] connection, review and download e-mails when new ones are available.
[Bug] Evolution automatically goes into offline mode, since the response of the network manager does not indicate a current network connection.
From offline mode can not be manually switched to online mode from the main menu either.

 Data of the mobile phone (modem):
Manufacturer: LG
Model: KP500
VendorId: 1004
ProductId: 6000
(Output lsusb): Bus 001 Device 006: ID 1004:6000 LG Electronics, Inc. VX4400/VX6000 Cell Phone
Equipped Interface: /dev/ttyACM0
(Dmesg output):
[174.976385] usb 1-4.3: new full speed USB device using ehci_hcd and address 6
[175.179050] cdc_acm 1-4.3:2.0: This device can not do calls on its own. It is not a modem.
[175.179179] cdc_acm 1-4.3:2.0: ttyACM0: USB ACM device
[175.183780] usbcore: registered new driver cdc_acm
[175.183792] cdc_acm: V0.26: USB Abstract Control Model driver for USB modems and ISDN adapters

Version of gnome-ppp:
  Installed: 0.3.23-1ubuntu3
  Candidate: 0.3.23-1ubuntu3
  Version table:
 *** 0.3.23-1ubuntu3 0
        500 http://de.archive.ubuntu.com/ubuntu/ natty / universe Packages i386
        100 / var / lib / dpkg / status

Network-manager version:
  Installed: 0.8.4-0ubuntu1 ~ git.20110228t143901.5cdded6
  Candidate: 0.8.4-0ubuntu1 ~ git.20110228t143901.5cdded6
  Version table:
 *** 0.8.4-0ubuntu1 ~ git.20110228t143901.5cdded6 0
        500 http://de.archive.ubuntu.com/ubuntu/ natty / main Packages i386
        100 / var / lib / dpkg / status

Version modemmanager:
  Installed: 0.4-0ubuntu1 + git.20110124t203624.00b6cce
  Candidate: 0.4-0ubuntu1 + git.20110124t203624.00b6cce
  Version table:
 *** 0.4-0ubuntu1 + git.20110124t203624.00b6cce 0
        500 http://de.archive.ubuntu.com/ubuntu/ natty / main Packages i386
        100 / var / lib / dpkg / status

Version of evolution:
  Installed: 2.32.2-0ubuntu3
  Candidate: 2.32.2-0ubuntu3
  Version table:
 *** 2.32.2-0ubuntu3 0
        500 http://de.archive.ubuntu.com/ubuntu/ natty / main Packages i386
        100 / var / lib / dpkg / status

Version update-manager:
  Installed: 1:0.146.5
  Nominee: 1:0.146.5
  Version table:
 *** 1:0.146.5 0
        500 http://de.archive.ubuntu.com/ubuntu/ natty / main Packages i386
        100 / var / lib / dpkg / status