I have a new Sager NP2650 laptop with a fresh Ubuntu 14.04LTS install. It has a Realtek RTL8723BE wireless adapter in it. Initially after installation I had no wireless, but I was able to get it working after following the instructions on this thread: http://ubuntuforums.org/showthread.php?t=2205497 . I had to checkout an earlier version of the driver from git as the thread says in order to get it to compile on my system.
The problem is that the connection eventually is lost within an hour or so, although Network Manager still shows it as connected. If I disable and re-enable the Wi-Fi or Networking it doesn't work. The wifi just endlessly tries to connect, but fails.
If I reboot it works fine again for a while.
I ran the wireless diagnostic script found elsewhere on the forum and uploaded my results here:
http://pastebin.ubuntu.com/7355768/
I could use some help. Thanks!