I am using Ubuntu 13.10 and a wireless internet from a modem "Reliance Netconnect" for the internet.
I've installed Ubuntu two days back along with my Windows system.
So here's a detailed summary of what happens:
I open my computer, the internet connects after I go to the top-right corner, select the signal logo and click on the "Reliance connection" (the only connection for internet on the PC).
It connects immediately and says "You're registered on the home network." and the internet works fine. However, each time I've opened my computer and connected, there's this problem: it automatically disconnects after a while (which is around 5-10 minutes I think).
Let me rephrase: it connects all fine and then disconnects by itself after a while of usage.
Now comes the main problem. NO MATTER HOW MANY TIMES I TRY TO CONNECT IT THROUGH THE SAME SIGNAL LOGO, IT JUST WON'T CONNECT EVER.
It only works when I open it again later and because now I know that rebooting does the trick (well it merely refreshes everything), I reboot to reconnect to internet.
Now, as anyone would tell you, rebooting is not a viable alternative to reconnecting.
What's surprising is I Googled it and not many people have this problem. On two separate threads, people first asked for full details about their modem and networks, drivers, etc. but weren't able to help at all.
I am writing this long piece because I am using my Windows at the moment. Please help me. I don't want to come back to Windows. Ubuntu is so awesome. Everything else is so attractive and I've set up fine. Just this problem is forcing me to leave Ubuntu - or any Linux for that matter. Please.