I have had the same problem since upgrading to 14.04 with my Toshiba Satellite A210 with RTL8187B wireless.
The instructions in comment #10 work for me. For simplicity here is the link provided in that comment: http://ubuntuforums.org/showthread.php?t=2218043&p=13000035#post13000035 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-nettool in Ubuntu. https://bugs.launchpad.net/bugs/1311257 Title: Wifi cannot connect or unstable after suspend 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-nettool/+bug/1311257/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs