Comment 4 for bug 1556607

@MinuteMan i woudl suggest a reinstall why? because on 13 march you were still on kernel 3.13 while back in January update to kernel 3.16 was already available. One more reason to do a reinstall is because switchboard self gives the warning that it cannot find plugs in the folder they should be placed.

which could mean you. there has gone something wrong without you knowing what you changed. or you are not an a official build of elementary os and you installed switchboard and all its plugs self on the distro you are using, you need cmake options to have the plug in the right folder for switchboard.

i think you should try to reinstall if the problem still exist let me know and provide a new output of this command

"switchboard -d power"

thanks in advance