My system is Gentoo amd64, KDE 4.11, and lightDM. I updated my system recently, and found out my user account can't shutdown from KDE. The function is disappeared. I looked for a long time, and I think it is a permission issue. I checked some blogs/wikis talking about polkit configuration. But none works for me.
So bascially, my question is, how to let a non-root user to have administrator permission in KDE with polkit?