can't connect to any wifi Dell Laitude D820

hi, I installed lubuntu on a dell latitude D820 but, the wifi does not work I installed the B43 frimware using : sudo apt-get install b43-fwcutter firmware-b43-installer but still can't connect to any wifi. I can see that my wifi network is snown I enter the right password but it can't connect

polkit problem

Hi, I got a polkit problem on a clean install of lubuntu 14.04 x86 after upgrade on login i am greeted by this popup title: Error texr: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: An authentication agent already exists for the given subject if I press valid, all the indicators icons reloa