Mathieu Trudel's suggestion did not work for me after coenting-out "no-auto-default=00:01:80:76:71:ca," from /etc/NetworkManager/nm-system-settings.conf and restarting.
Also, my /etc/network/interfaces only has the following lines. There is no reference to eth0, so, whti reference to Petar Velkovski's suggestion. there was nothing for me to comment out: Here is my /etc/network/interfaces file... auto lo iface lo inet loopback Even dhclient & network-manager restart "approach" is trial and error. In my syslog, I see "bluez error getting default adapter: The name org.bluez was not provided by any .service files." I do not know if it related to this issue or is a separate problem. Here is a portion of my syslog file that shows eth0 is brought up, and then it goes down (with reason 2 ???)... Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: Ifupdown: get unmanaged devices count: 0 Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: SCPlugin-Ifupdown: (33466944) ... get_connections. Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: SCPlugin-Ifupdown: (33466944) ... get_connections (managed=false): return empty list. Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: Ifupdown: get unmanaged devices count: 0 Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> WiFi enabled by radio killswitch; enabled by state file Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> WWAN enabled by radio killswitch; enabled by state file Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> WiMAX enabled by radio killswitch; enabled by state file Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> Networking is enabled by state file Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): carrier is OFF Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): new Ethernet device (driver: 'e1000e' ifindex: 2) Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/0 Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): now managed Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): device state change: 1 -> 2 (reason 2) Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): bringing up device. Oct 17 04:44:48 Computer-1000 kernel: [ 894.570244] e1000e 0000:00:19.0: irq 40 for MSI/MSI-X Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): preparing device. Oct 17 04:44:48 Computer-1000 NetworkManager[2046]: <info> (eth0): deactivating device (reason: 2). -- [Maverick] Auto eth0 not working after latest package upgrade https://bugs.launchpad.net/bugs/635475 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs