I have been using Ubuntu 12.04 for a long time. I update Ubuntu once in a month. The last time I updated networking issues started cropping up.
My internet connection disconnects, and after some long amount of time it reconnects.
I tried searching a lot and tried some solutions, but none of them works for me. The things that I tried are:
nameservers(from google and open DNS) - I did this because I found DNS resolution itself fails, so I thought this might help.
/etc/NetworkManager/NetworkManager.confturning off dnsmasq.
- Ignoring ipv6 as suggested here.
...but nothing seems to correct it.
I have to disable-enable networking to fix the issue.