Seemingly at random, my internet stops working on Ubuntu 13.04. Specifically, wired and wireless show as connected, but I cannot reach any page using any web browser or get a ping response.
I can sometimes get a few minutes of internet access when I reboot, although whether or not this happens also appears to be at random. It always disappears, although still shows as being connected, after no more than 5 minutes though.
I've isolated the problem to Ubuntu itself:
- No issue on Windows 7
- Issue persists on Unity, Cinnamon desktop, Gnome desktop
- Issue persists with multiple networks
I've also tried
sudo dhclient wlan0 as recommended in a similar thread, with no luck after rebooting.
I'm unsure of what the issue could be, because it worked previously with no issues on 12.10 and 13.04, and I can't isolate any action that caused it.
If anybody has any ideas, I'd be very grateful.