At last found the problem. In my /etc/network/interfaces, I had an entry for eth0 as auto eth0 iface eth0 inet manual
On commenting these 2 lines, as well as the entry for ppp connection which I had been using a while ago, network manager is able get connected when booting/logging in. Am not sure what set the eth0 to manual, may be it happened when using ppp. Closing this issue as it might be something wrong with my system and not a generally happening bug. ** Changed in: network-manager (Ubuntu) Status: New => Invalid -- not connected to network when booting https://bugs.launchpad.net/bugs/290973 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