Had that issue also. Just installed the Linux subi 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux kernel from the 14.04 repos and now the buttons works.
In Kubuntu when I press the button it turns "yellowish" and KDE Network Manager shows Wifi as disabled. When I press it again, Wifi becomes enabled again (the card).
Had that issue also. Just installed the Linux subi 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux kernel from the 14.04 repos and now the buttons works.
In Kubuntu when I press the button it turns "yellowish" and KDE Network Manager shows Wifi as disabled. When I press it again, Wifi becomes enabled again (the card).