init 1, networking start fails to bring up network.

Binary package hint: network-manager

After a network outage, when I go to restart the network by invoking init 1, or /etc/init.d/network start, my network is still down. I am unable to use the internet, or ping other networks, I have to restart Ubuntu in order to get networking started.

This is a wired eth0 syskonnect pci-e card, that I use for connecting to the network.

Linux Gnu-Raiz 2.6.20-16-generic #2 SMP Thu Jun 7 19:00:28 UTC 2007 x86_64 GNU/Linux
taken from kern.log
Aug 5 22:03:31 Gnu-Raiz kernel: [133674.327860] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Aug 5 22:08:55 Gnu-Raiz kernel: [133997.895679] sky2 eth0: disabling interface

taken from syslog

Aug 5 22:08:55 Gnu-Raiz avahi-daemon[5252]: Leaving mDNS multicast group on interface eth0.IPv4 with address 169.254.5.187.
Aug 5 22:08:55 Gnu-Raiz NetworkManager: <information>^ISWITCH: terminating current connection 'eth0' because it's no longer valid.
Aug 5 22:08:55 Gnu-Raiz NetworkManager: <information>^IDeactivating device eth0.
Aug 5 22:08:55 Gnu-Raiz avahi-autoipd(eth0)[7406]: SIOCSIFFLAGS failed: Permission denied
Aug 5 22:08:55 Gnu-Raiz avahi-autoipd(eth0)[7406]: Callout STOP, address 169.254.5.187 on interface eth0
Aug 5 22:08:55 Gnu-Raiz avahi-daemon[5252]: Withdrawing address record for fe80::200:5aff:fe72:a13c on eth0.
Aug 5 22:08:55 Gnu-Raiz avahi-daemon[5252]: Withdrawing address record for 169.254.5.187 on eth0.
Aug 5 22:08:55 Gnu-Raiz NetworkManager: nm_device_is_802_3_ethernet: assertion `dev != NULL' failed
Aug 5 22:08:55 Gnu-Raiz avahi-autoipd(eth0)[7407]: client: RTNETLINK answers: No such device
Aug 5 22:08:55 Gnu-Raiz avahi-autoipd(eth0)[7407]: Script execution failed with return value 2