HI all. I have a problem with my work computer. It is a dual boot WIN7/Ubuntu 10.10. Everything was working fine. I did a last round of updates on Ubuntu. Restarted into Windows to do something. After restarting back into Ubutu, my network interface was displaying that it was disconnecting. After that I was never able to get back onto the network.

Windows side works perfectly, so its not a hardware issue or a workplace network issue.

I have tailed my daemon.log, and downed and uped my network interface for you to see the output. Also I have highlighted some messages in red. Thanks:

tail -f /var/log/daemon.log
May 3 08:16:20 rti-is019-con gdm-session-worker[2650]: WARNING: Unable to load file '/etc/gdm/custom.conf': No such file or directory
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Successfully made thread 2656 of process 2656 (n/a) owned by '113' high priority at nice level -11.
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Supervising 4 threads of 2 processes of 2 users.
May 3 08:16:20 rti-is019-con gdm-simple-greeter[2648]: Gtk-WARNING: /build/buildd/gtk+2.0-2.22.0/gtk/gtkwidget.c:5684: widget not within a GtkWindow
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Successfully made thread 2667 of process 2656 (n/a) owned by '113' RT at priority 5.
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Supervising 5 threads of 2 processes of 2 users.
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Successfully made thread 2668 of process 2656 (n/a) owned by '113' RT at priority 5.
May 3 08:16:20 rti-is019-con rtkit-daemon[1340]: Supervising 6 threads of 2 processes of 2 users.
May 3 08:16:23 rti-is019-con gdm-session-worker[2650]: GLib-GObject-CRITICAL: g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed
May 3 08:16:29 rti-is019-con gnome-session[2695]: EggSMClient-WARNING: Desktop file '/root/.config/autostart/cairo-dock-cairo.desktop' has malformed Icon key 'cairo-dock.svg'(should not include extension)
May 3 08:17:39 rti-is019-con dhclient: There is already a pid file /var/run/dhclient.eth0.pid with pid 1851
May 3 08:17:39 rti-is019-con dhclient: killed old client process, removed PID file
May 3 08:17:39 rti-is019-con dhclient: Internet Systems Consortium DHCP Client V3.1.3
May 3 08:17:39 rti-is019-con dhclient: Copyright 2004-2009 Internet Systems Consortium.
May 3 08:17:39 rti-is019-con dhclient: All rights reserved.
May 3 08:17:39 rti-is019-con dhclient: For info, please visit
May 3 08:17:39 rti-is019-con dhclient:
May 3 08:17:39 rti-is019-con dhclient: Listening on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:17:39 rti-is019-con dhclient: Sending on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:17:39 rti-is019-con dhclient: Sending on Socket/fallback
May 3 08:17:39 rti-is019-con dhclient: DHCPRELEASE on eth0 to 10.70.25.25 port 67
May 3 08:17:39 rti-is019-con dhclient: send_packet: Network is unreachable
May 3 08:17:39 rti-is019-con dhclient: send_packet: please consult README file regarding broadcast address.
May 3 08:17:39 rti-is019-con avahi-daemon[1136]: Interface eth0.IPv6 no longer relevant for mDNS.
May 3 08:17:39 rti-is019-con avahi-daemon[1136]: Leaving mDNS multicast group on interface eth0.IPv6 with address fe80::f24d:a2ff:fedb:e1d2.
May 3 08:17:39 rti-is019-con avahi-daemon[1136]: Withdrawing address record for fe80::f24d:a2ff:fedb:e1d2 on eth0.
May 3 08:17:39 rti-is019-con NetworkManager[1237]: <info> (eth0): carrier now OFF (device state 3)
May 3 08:17:39 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 3 -> 2 (reason 40)
May 3 08:17:39 rti-is019-con NetworkManager[1237]: <info> (eth0): deactivating device (reason: 40).
May 3 08:17:48 rti-is019-con dhclient: Internet Systems Consortium DHCP Client V3.1.3
May 3 08:17:48 rti-is019-con dhclient: Copyright 2004-2009 Internet Systems Consortium.
May 3 08:17:48 rti-is019-con dhclient: All rights reserved.

May 3 08:17:48 rti-is019-con dhclient:
May 3 08:17:48 rti-is019-con dhclient: Listening on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:17:48 rti-is019-con dhclient: Sending on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:17:48 rti-is019-con dhclient: Sending on Socket/fallback
May 3 08:17:48 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
May 3 08:17:51 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
May 3 08:17:52 rti-is019-con NetworkManager[1237]: <info> (eth0): carrier now ON (device state 2)
May 3 08:17:52 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 2 -> 3 (reason 40)
May 3 08:17:54 rti-is019-con avahi-daemon[1136]: Joining mDNS multicast group on interface eth0.IPv6 with address fe80::f24d:a2ff:fedb:e1d2.
May 3 08:17:54 rti-is019-con avahi-daemon[1136]: New relevant interface eth0.IPv6 for mDNS.
May 3 08:17:54 rti-is019-con avahi-daemon[1136]: Registering new address record for fe80::f24d:a2ff:fedb:e1d2 on eth0.*.
May 3 08:17:57 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 14
May 3 08:18:11 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 20
May 3 08:18:31 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10
May 3 08:18:31 rti-is019-con dhclient: DHCPOFFER of 10.70.29.178 from 10.70.31.253
May 3 08:18:31 rti-is019-con dhclient: DHCPREQUEST of 10.70.29.178 on eth0 to 255.255.255.255 port 67
May 3 08:18:31 rti-is019-con dhclient: DHCPACK of 10.70.29.178 from 10.70.31.253
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.70.29.178.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: New relevant interface eth0.IPv4 for mDNS.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Registering new address record for 10.70.29.178 on eth0.IPv4.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Withdrawing address record for 10.70.29.178 on eth0.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Leaving mDNS multicast group on interface eth0.IPv4 with address 10.70.29.178.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Interface eth0.IPv4 no longer relevant for mDNS.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Joining mDNS multicast group on interface eth0.IPv4 with address 10.70.29.178.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: New relevant interface eth0.IPv4 for mDNS.
May 3 08:18:31 rti-is019-con avahi-daemon[1136]: Registering new address record for 10.70.29.178 on eth0.IPv4.
May 3 08:18:31 rti-is019-con dhclient: bound to 10.70.29.178 -- renewal in 344655 seconds.
May 3 08:18:47 rti-is019-con ntpdate[3083]: step time server 91.189.94.4 offset 3.272073 sec
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) starting connection 'Auto eth0'
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 3 -> 4 (reason 0)
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) scheduled...
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) started...
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) scheduled...
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 1 of 5 (Device Prepare) complete.
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) starting...
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 4 -> 5 (reason 0)
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) successful.
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) scheduled.
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 2 of 5 (Device Configure) complete.
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) started...
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 5 -> 7 (reason 0)
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Beginning DHCPv4 transaction (timeout in 45 seconds)
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> dhclient started with pid 3108
May 3 08:19:32 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 3 of 5 (IP Configure Start) complete.
May 3 08:19:32 rti-is019-con dhclient: Internet Systems Consortium DHCP Client V3.1.3
May 3 08:19:32 rti-is019-con dhclient: Copyright 2004-2009 Internet Systems Consortium.
May 3 08:19:32 rti-is019-con dhclient: All rights reserved.

May 3 08:19:32 rti-is019-con dhclient:
May 3 08:19:32 rti-is019-con dhclient: /var/run/nm-dhclient-eth0.conf line 7: semicolon expected.
May 3 08:19:32 rti-is019-con dhclient: also request
May 3 08:19:32 rti-is019-con dhclient: ^
May 3 08:19:32 rti-is019-con dhclient: /var/run/nm-dhclient-eth0.conf line 8: semicolon expected.
May 3 08:19:32 rti-is019-con dhclient: also
May 3 08:19:32 rti-is019-con dhclient: ^
May 3 08:19:32 rti-is019-con dhclient: /var/run/nm-dhclient-eth0.conf line 9: semicolon expected.
May 3 08:19:32 rti-is019-con dhclient: also request
May 3 08:19:32 rti-is019-con dhclient: ^
May 3 08:19:32 rti-is019-con dhclient: /var/run/nm-dhclient-eth0.conf line 10: semicolon expected.
May 3 08:19:32 rti-is019-con dhclient: also
May 3 08:19:32 rti-is019-con dhclient: ^
May 3 08:19:32 rti-is019-con dhclient: can't create /usr/local/var/lib/dhcp3/dhclient-1537db51-4a51-4dd4-b512-c779f0b420ee-eth0.lease: No such file or directory
May 3 08:19:32 rti-is019-con dhclient: execve (/usr/local/libexec/nm-dhcp-client.action, ...): Permission denied
May 3 08:19:32 rti-is019-con dhclient: Listening on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:19:32 rti-is019-con dhclient: Sending on LPF/eth0/f0:4d:a2:db:e1:d2
May 3 08:19:32 rti-is019-con dhclient: Sending on Socket/fallback
May 3 08:19:32 rti-is019-con dhclient: Can't create /usr/local/var/run/dhclient-eth0.pid: Permission denied
May 3 08:19:32 rti-is019-con dhclient: DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
May 3 08:19:32 rti-is019-con dhclient: DHCPOFFER of 10.70.29.178 from 10.70.31.253
May 3 08:19:32 rti-is019-con dhclient: DHCPREQUEST of 10.70.29.178 on eth0 to 255.255.255.255 port 67
May 3 08:19:32 rti-is019-con dhclient: DHCPACK of 10.70.29.178 from 10.70.31.253
May 3 08:19:32 rti-is019-con dhclient: execve (/usr/local/libexec/nm-dhcp-client.action, ...): Permission denied
May 3 08:19:32 rti-is019-con dhclient: can't create /usr/local/var/lib/dhcp3/dhclient-1537db51-4a51-4dd4-b512-c779f0b420ee-eth0.lease: No such file or directory
May 3 08:19:32 rti-is019-con dhclient: bound to 10.70.29.178 -- renewal in 313910 seconds.
May 3 08:19:32 rti-is019-con dhclient: Can't create /usr/local/var/run/dhclient-eth0.pid: Permission denied
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <warn> (eth0): DHCPv4 request timed out.
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> (eth0): canceled DHCP transaction, DHCP client pid 3108
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) scheduled...
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) started...
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) scheduled...
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 4 of 5 (IP4 Configure Timeout) complete.
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) started...
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) failed (no IP configuration found)
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 7 -> 9 (reason 5)
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Marking connection 'Auto eth0' invalid.
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <warn> Activation (eth0) failed.
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> (eth0): device state change: 9 -> 3 (reason 0)
May 3 08:20:18 rti-is019-con NetworkManager[1237]: <info> (eth0): deactivating device (reason: 0).
May 3 08:20:18 rti-is019-con avahi-daemon[1136]: Withdrawing address record for 10.70.29.178 on eth0.
May 3 08:20:18 rti-is019-con avahi-daemon[1136]: Leaving mDNS multicast group on interface eth0.IPv4 with address 10.70.29.178.
May 3 08:20:18 rti-is019-con avahi-daemon[1136]: Interface eth0.IPv4 no longer relevant for mDNS.