kazdopadne diky. pridal jsem do rules. jinak k tomu wiboxu - v signals mam tohle a stejne mi to nikdy nefungovalo:

client.add_signal("manage", function (c, startup)

-- Nova plovouci okna nebudou prekryvat wibox
awful.placement.no_offscreen(c)

 if not startup then
    -- Set the windows at the slave,
    -- i.e. put it at the end of others instead of setting it master.
    awful.client.setslave(c)

     -- Put windows in a smart way, only if they does not set an initial position.
     if not c.size_hints.user_position and not c.size_hints.program_position then
           awful.placement.no_overlap(c)
           awful.placement.no_offscreen(c)
      end
 end
end)