Final fixes for kobo suspend

frontend/ui/device.lua

@@ -152,18 +152,16 @@ function Device:outofScreenSaver()
 	self.screen_saver_mode = false
 end
 
-function Device:Suspend()
-	UIManager:show(InfoMessage:new{
-			text = _("Standby"),
-			timeout = 4,
-		})
-	Screen:refresh(0)
+function Device:prepareSuspend()
 	local fl = self:getFrontlight()
 	if fl ~= nil then
-		fl:sleep()
+		fl.fl:sleep()
 	end
-	util.usleep(1500000)
+	Screen:refresh(0)
 	self.screen_saver_mode = true
+end
+
+function Device:Suspend()
 	os.execute("./kobo_suspend.sh")
 end
 
@@ -173,19 +171,11 @@ function Device:Resume()
 	Screen:refresh(0)
 	local fl = self:getFrontlight()
 	if fl ~= nil then
-		fl:resume()
+		fl.fl:restore()
 	end
 	self.screen_saver_mode = false
 end
 
-function Device:Power()
-	if self.screen_saver_mode == true then
-		self:Resume()
-	else
-		self:Suspend()
-	end
-end
-
 function Device:usbPlugIn()
 	--os.execute("echo 'usb in' >> /mnt/us/event_test.txt")
 	if self.charging_mode == false and self.screen_saver_mode == false then

frontend/ui/uimanager.lua

@@ -293,11 +293,16 @@ function UIManager:run()
 				Device:usbPlugOut()
 			elseif input_event == "Light" then
 				Device:getFrontlight():toggle()
-			elseif input_event == "Power" then
-				Device:Power()
-			elseif input_event == "Suspend" then
-				Device:Suspend()
-			elseif input_event == "Resume" then
+			elseif (input_event == "Power" and not Device.screen_saver_mode) or
+			input_event == "Suspend" then
+				UIManager:show(InfoMessage:new{
+					text = _("Standby"),
+					timeout = 1,
+				})
+				Device:prepareSuspend()
+				UIManager:scheduleIn(0.5, function() Device:Suspend() end)
+			elseif (input_event == "Power" and Device.screen_saver_mode) or
+			input_event == "Resume" then
 				Device:Resume()
 			else
 				self:sendEvent(input_event)