diff --git a/defaults.lua b/defaults.lua
index 29259495e..c2c290808 100644
--- a/defaults.lua
+++ b/defaults.lua
@@ -173,7 +173,6 @@ SEARCH_SERIES = true
 SEARCH_PATH = true
 
 -- Light parameter for Kobo
-KOBO_LIGHT_OFF_ON_SUSPEND = false
 KOBO_LIGHT_ON_START = -1           -- -1 or 0-100. -1 leaves light as it is, other sets light on start/wake up
 KOBO_SCREEN_SAVER = ""             -- image or directory with pictures or "-"
 KOBO_SCREEN_SAVER_LAST_BOOK = true -- get screensaver from last book if possible
diff --git a/frontend/device/kobo/device.lua b/frontend/device/kobo/device.lua
index 1495f0948..efd31a06d 100644
--- a/frontend/device/kobo/device.lua
+++ b/frontend/device/kobo/device.lua
@@ -108,9 +108,6 @@ function Kobo:getFirmwareVersion()
 end
 
 function Kobo:Suspend()
-    if KOBO_LIGHT_OFF_ON_SUSPEND then
-        self.powerd:setIntensity(0)
-    end
     os.execute("./suspend.sh")
 end
 
diff --git a/frontend/ui/uimanager.lua b/frontend/ui/uimanager.lua
index 1a3552fb4..9291d4f66 100644
--- a/frontend/ui/uimanager.lua
+++ b/frontend/ui/uimanager.lua
@@ -232,6 +232,12 @@ function UIManager:scheduleIn(seconds, action)
     self:schedule(when, action)
 end
 
+-- unschedule an execution task
+-- in order to unschedule anonymous functions, store a reference
+-- for example:
+-- self.anonymousFunction = function() self:regularFunction() end
+-- UIManager:scheduleIn(10, self.anonymousFunction)
+-- UIManager:unschedule(self.anonymousFunction)
 function UIManager:unschedule(action)
     for i = #self._execution_stack, 1, -1 do
         local task = self._execution_stack[i]