[Pkg-utopia-maintainers] Bug#754483: network-manager: Creating object for path '/org/freedesktop/NetworkManager/ActiveConnection/4' failed in libnm-glib.

[David Raison]

I experience the same issue than the OP on current testing (jessie) 
using systemd.

In my case, this occurs when selecting a "Wired connection" in the 
Network-Manager applet.
I'm using   network-manager 0.9.10.0-3 and network-manager-gnome (for 
the nm-applet binary)
0.9.10.0-2

Connecting to a wireless network works fine.

Here's the output of systemctl status.

root at mazer:~# systemctl status NetworkManager.service
● NetworkManager.service - Network Manager
    Loaded: loaded (/lib/systemd/system/NetworkManager.service; enabled)
    Active: active (running) since Fri 2014-10-10 18:14:35 CEST; 2 days ago
  Main PID: 8721 (NetworkManager)
    CGroup: /system.slice/NetworkManager.service
            ├─ 8721 /usr/sbin/NetworkManager --no-daemon
            └─30108 /sbin/dhclient -d -sf 
/usr/lib/NetworkManager/nm-dhcp-helper -pf /var/run/dhclient-wlan0.pid 
-lf /var/lib/NetworkManager/dhclient-ee9a7...

Oct 13 12:39:43 mazer NetworkManager[8721]: <info> Activation (eth0) 
Stage 2 of 5 (Device Configure) successful.
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> Activation (eth0) 
Stage 3 of 5 (IP Configure Start) scheduled.
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> Activation (eth0) 
Stage 2 of 5 (Device Configure) complete.
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> Activation (eth0) 
Stage 3 of 5 (IP Configure Start) started...
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> (eth0): device state 
change: config -> ip-config (reason 'none') [50 70 0]
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> (eth0): device state 
change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
Oct 13 12:39:43 mazer NetworkManager[8721]: <warn> Activation (eth0) 
failed for connection 'eth0'
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> Activation (eth0) 
Stage 3 of 5 (IP Configure Start) complete.
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> (eth0): device state 
change: failed -> disconnected (reason 'none') [120 30 0]
Oct 13 12:39:43 mazer NetworkManager[8721]: <info> (eth0): deactivating 
device (reason 'none') [0]


The issue seems to be a configuration issue though. Editing the 
connections in the applet and setting the method in the "IPv4 Settings" 
for the wired connection to "Automatic (DHCP)" worked for me. It was 
initially set to "Ignore".

best regards,
David