You shouldn't need to reinstall anything, this sounds simply like the packages of network-manager not all being at the same version: this is why we suggest rebooting after these packages change, as indicated by the red icon at the top right corner of the screen (the power symbol). Rebooting is normally sufficient, otherwise there may be an issue with the exact packages being installed separately from a "default" install.
Can you tell what was being installed at the time or just before this appeared? Providing /var/log/apt/history.log may help here if we can also have a clear date of when this started to happen. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/856101 Title: No network interfaces configured after login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/856101/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
