Network Manager, device not managed

[Ahmad Gharbeia أحمد غربية]

Binary package hint: network-manager

I'm using a wired network.

After upgrading to Intrepid from Hardy, I noticed that the Network Manager had a little red x mark on it indicating that it was not detecting a network, and the "Wired" tab didn't list any connections. However the network was working normally, so I ignored it temporarily concentrating on continuing the upgrade to Jaunty and hoping that it will be solved then.

After upgrading to Jaunty the issue persisted; similar to what's described at http://ubuntuforums.org/showthread.php?t=1109585

Like what is described in the above thread, changing "false" in
[ifupdown]
managed=false

in /etc/NetworkManager/nm-system-settings.conf to "true" solved it and the connection is detected in NM.

However output of lspci | grep Ethernet is:

00:0c.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86)

and output of sudo lshw -C network is:

 *-network
       description: Ethernet interface
       product: VT6105/VT6106S [Rhine-III]
       vendor: VIA Technologies, Inc.
       physical id: c
       bus info: pci@0000:00:0c.0
       logical name: eth0
       version: 86
       serial: 00:0f:3d:ca:d8:a1
       size: 100MB/s
       capacity: 100MB/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=via-rhine driverversion=1.4.3 duplex=full ip=192.168.42.43 latency=64 link=yes maxlatency=8 mingnt=3 module=via_rhine multicast=yes port=MII speed=100MB/s

when in fact my NIC is D-Link DFE-530TX PCI Fast Ethernet Adapter and was being detected as such in Hardy; i.e. before the upgrade to Intrepid.

This maybe related: https://bugs.launchpad.net/ubuntu/intrepid/+source/network-manager/+bug/327053 may be related