device state change: ip-config -> failed (reason 'ip-config-unavailable')

[NoOp]

On 12/14/2011 04:00 PM, Robert P. J. Day wrote:
> 
>   after the wired network connection in my hotel room had *seemed* to
> be working for a short while, now i'm getting nothing, and all DHCP
> client attempts to connect generate this in /var/log/syslog:
> 
> ... snip ...
> Dec 14 18:52:19 oneiric kernel: [ 2497.892781] eth0: no IPv6 routers present
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> (eth0): IP6 addrconf timed out or failed.
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Timeout) scheduled...
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Timeout) started...
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) started...
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) failed (no IP configuration found)
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> (eth0): device state change: ip-config -> failed (reason 'ip-config-unavailable') [70 120 5]
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Marking connection 'Wired connection 1' invalid.
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <warn> Activation (eth0) failed.
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 5 of 5 (IP Configure Commit) complete.
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> Activation (eth0) Stage 4 of 5 (IP6 Configure Timeout) complete.
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> (eth0): device state change: failed -> disconnected (reason 'none') [120 30 0]
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> (eth0): deactivating device (reason 'none') [0]
> Dec 14 18:52:28 oneiric NetworkManager[1067]: <info> (eth0): canceled DHCP transaction, DHCP client pid 3718
> 

Might be worth looking through these 3 pages:
http://ubuntuforums.org/showthread.php?t=1816095
[eth0 not working help !!]

And will show you what info helps in troubleshooting your system.
...