l: add brightness controls to xmonad

lass/2configs/xserver/default.nix

@@ -89,6 +89,7 @@ let
       pkgs.rxvt_unicode
       pkgs.i3lock
       pkgs.pulseaudioLight
+      pkgs.xorg.xbacklight
     ] ++ config.environment.systemPackages)}:/var/setuid-wrappers
     settle() {(
       # Use PATH for a clean journal

lass/5pkgs/xmonad-lass/Main.hs

@@ -105,6 +105,8 @@ myKeyMap =
     , ("<XF86AudioMute>", spawn "pactl -- set-sink-mute 0 toggle")
     , ("<XF86AudioMicMute>", spawn "pactl -- set-source-mute 1 toggle")
     , ("<XF86Launch1>", gridselectWorkspace gridConfig W.view)
+    , ("<XF86MonBrightnessUp>", spawn "xbacklight -steps 1 -time 1 -inc 3")
+    , ("<XF86MonBrightnessDown>", spawn "xbacklight -steps 1 -time 1 -dec 3")
 
     , ("M4-a", focusUrgent)
     , ("M4-S-r", renameWorkspace    def)