I had the same problem (no ping to 8.8.8.8 possible, but local access works). Finally I found out that the Tips and Tweaks Plugin killed my network settings. I do not know why, but after removing the "eth0" of the list and rebooting the machine, the internet was accessible again:   I think the plugin is overwriting my settings on boot causing this error. I will post this in the plugin's thread, too.   EDIT: Sometimes even the local network did not work. If this happens