Ubuntu
network-manager-applet package

NetworkManager Applet cannot see my ethernet connection anymore

Bug #305398 reported by Andrea Grandi
24
This bug affects 3 people
Affects Status Importance Assigned to Milestone
network-manager-applet (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Hi all,

since some days I've a problem with Network Manager applet: it cannot detect my ethernet card anymore, even if it's working fine (like right now... I'm connected to the router using that).

This is my interface:

eth0 Link encap:Ethernet HWaddr 00:1f:c6:ed:71:3a
          inet addr:192.168.0.108 Bcast:192.168.0.255 Mask:255.255.255.0
          inet6 addr: fe80::21f:c6ff:feed:713a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:37884 errors:0 dropped:0 overruns:0 frame:0
          TX packets:56755 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:24843885 (24.8 MB) TX bytes:7279808 (7.2 MB)
          Interrupt:23 Base address:0xe000

1) I'm using Ubuntu Intrepid 8.10, with intrepid-proposed repository enabled.
Kernel: Linux centurion 2.6.27-10-generic #1 SMP Fri Nov 21 12:00:22 UTC 2008 i686 GNU/Linux

2) This is the version of package I'm using: 0.7~~svn20081018t105859-0ubuntu1.8.10.1

3) I expect Network Manager applet to detect my ethernet connection like it has always done.
Another problem: if I click on "Edit connections" in the applet menu, when "Network Connections" is visible, I click on "Add" button, but nothing happens.

4) In "Connection Information" I see: Error displaying connection information: No valid active connections found!

Conclusion: my eth0 is working fine. I'm connected to internet using it. Network Manager applet cannot see it.

Revision history for this message
peshooo (pesho-yes) wrote :

I have similar problem. Suddenly my networking stopped working. The problem was it could not assign the DNS servers, even when I typed them in the network manager. Finally I edited /etc/resolv.conf

And even now when it is working I see the same thing:

Error displaying connection information:

No valid active connections found!

I run Kubuntu 8.10

Revision history for this message
Michel Graciano (michel-graciano) wrote :

Hi,
to solve a similar problem, I just removed all interfaces from /etc/network/interfaces and restart my workstation.
My current interfaces file is something like that:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

And now I can manage the connections on my NM. I am using Ubuntu 8.10.

Revision history for this message
Andrea Grandi (andreagrandi) wrote :

I don't know if this thing ca work for me... nobody has modified that file since 16 october 2008. You can see mine here: http://pastebin.com/m6c881eb

Anyway, even if it would work, it would be only a workaround, so I think this bug should remain open until someone fix it.

Revision history for this message
Nikos Paraschou (niparasc) wrote :

Graciano's suggestion solved my problem.

I removed all interfaces from /etc/network/interfaces, restarted and network-manager works as it should.

I am using Ubuntu 8.10.

Revision history for this message
Nikos Paraschou (niparasc) wrote :

Some more information that might prove helpful.

Before the bug, I was using static IP. My /etc/network/interfaces looked like this:

auto lo
iface lo inet loopback

iface eth0 inet static
address 192.168.1.30
netmask 255.255.255.0
gateway 192.168.1.138

auto eth0

After deleting everything but the first two lines (and restarting) the problem was solved (as stated earlier). Now I am using dhcp.

Revision history for this message
deisler (dennis-solidstateservices) wrote :

I have the same problem. Ubuntu 8.10 x64 Desktop. The network icon in the top panel now has a red triangle over it. When I right-click the icon, and then click Connection Information, I receive the following error message:
"Error displaying connection information: No valid active connections found"

Networking works correctly. I have a network bridge configured in /etc/network/interfaces:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet manual

auto br0
iface br0 inet static
        address 192.168.20.10
        network 192.168.20.0
        netmask 255.255.255.0
        broadcast 192.168.20.255
        gateway 192.168.20.1
        bridge_ports eth0
        bridge_fd 9
        bridge_hello 2
        bridge_maxage 12
        bridge_stp off

Revision history for this message
Alexander Sack (asac) wrote : Re: [Bug 305398] Re: NetworkManager Applet cannot see my ethernet connection anymore

Andrea Grandi wrote:
> I don't know if this thing ca work for me... nobody has modified that
> file since 16 october 2008. You can see mine here:
> http://pastebin.com/m6c881eb
>
> Anyway, even if it would work, it would be only a workaround, so I think
> this bug should remain open until someone fix it.
>
>
 /etc/network/interfaces is deprecated for network manager users for some
time. NM doesnt see devices configured in there. If you ever configured
your network from outside of NM you probably see it.

Anyway, we are working on improving NM legacy support for
/etc/network/interfaces; so i resolve this bug as invalid.

Thanks for reporting anyway

 status invalid

Changed in network-manager-applet:
status: New → Invalid
Revision history for this message
Andrea Grandi (andreagrandi) wrote :

@Alexander: so, what is the new configuration file for network interfaces? I did think /etc/network/interface was a standard for debian based distributions....

Revision history for this message
Dingar (cndingar) wrote :

Graciano's suggestion is good and I have resolved my problem.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.

Duplicates of this bug

Subscribing...

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.