Also, in my case, I can fix the problem issuing the commands below: sudo /etc/init.d/networking stop sudo /etc/init.d/networking start
As I use network manager, these commands affect only loopback interface. I didn't check loopback interface before restarting it. Will do next time. -- Unable to start applications after suspend/hibernation https://launchpad.net/bugs/49221 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
