* Suspend when the laptop lid is closed.

svn path=/nixos/trunk/; revision=14038

upstart-jobs/acpid.nix

@@ -12,6 +12,9 @@ let
     ''
       event=button/power.*
       action=${powerEventHandler} "%e"
+
+      event=button/lid.*
+      action=${lidEventHandler} "%e"
     '';
 
   # Called when the power button is pressed.
@@ -23,6 +26,22 @@ let
       exit 0
     '';
 
+  # Called when the laptop lid is opened/closed.
+  lidEventHandler = pkgs.writeScript "acpi-lid.sh"
+    ''
+      #! ${pkgs.bash}/bin/sh
+
+      # Suspend to RAM if the lid is closed.  (We also get this event
+      # when the lid just opened, in which case we obviously don't
+      # want to suspend again.) 
+      if grep -q closed /proc/acpi/button/lid/LID/state; then
+          sync
+          echo mem > /sys/power/state
+      fi
+
+      exit 0
+    '';
+
 in
 
 {

upstart-jobs/hal.nix

@@ -21,6 +21,8 @@
   job = ''
     description "HAL daemon"
 
+    # !!! TODO: make sure that HAL starts after acpid,
+    # otherwise hald-addon-acpi will grab /proc/acpi/event.
     start on dbus
     stop on shutdown