fix(kobo): partially fix suspend support

Tested in Kobo Aura HD.

Suspend can still be interrrupted if user touches the screen after
slided the power button and before the suspend function is called (2s delay).

Reason for this is still unkown.

frontend/ui/uimanager.lua

@@ -220,6 +220,8 @@ end
 -- it is intended to manage input events and delegate
 -- them to dialogs
 function UIManager:run()
+    local suspend_msg = nil
+
     self._running = true
     while self._running do
         local now = { util.gettime() }
@@ -340,7 +342,6 @@ function UIManager:run()
 
         -- delegate input_event to handler
         if input_event then
-            --DEBUG("in ui.lua:", input_event)
             if input_event == "IntoSS" then
                 self:sendEvent(Event:new("FlushSettings"))
                 Device:intoScreenSaver()
@@ -353,20 +354,25 @@ function UIManager:run()
                 self:sendEvent(Event:new("NotCharging"))
             elseif input_event == "Light" then
                 Device:getPowerDevice():toggleFrontlight()
-            elseif (input_event == "Power" and not Device.screen_saver_mode)
-                    or input_event == "Suspend" then
-                local InfoMessage = require("ui/widget/infomessage")
-                self:show(InfoMessage:new{
-                    text = _("Standby"),
-                    timeout = 1,
-                })
+            elseif (input_event == "Power" or input_event == "Suspend")
+                    and not Device.screen_saver_mode then
+                if not suspend_msg then
+                    local InfoMessage = require("ui/widget/infomessage")
+                    suspend_msg = InfoMessage:new{
+                        text = _("Suspended"),
+                    }
+                end
+                self:show(suspend_msg)
                 self:sendEvent(Event:new("FlushSettings"))
                 Device:prepareSuspend()
-                self:scheduleIn(0.5, function() Device:Suspend() end)
-            elseif (input_event == "Power" and Device.screen_saver_mode)
-                    or input_event == "Resume" then
+                self:scheduleIn(2, function() Device:Suspend() end)
+            elseif (input_event == "Power" or input_event == "Resume")
+                    and Device.screen_saver_mode then
                 Device:Resume()
                 self:sendEvent(Event:new("Resume"))
+                if suspend_msg then
+                    self:close(suspend_msg)
+                end
             elseif input_event == "SaveState" then
                 self:sendEvent(Event:new("FlushSettings"))
             else

kobo/suspend.sh

@@ -2,7 +2,7 @@
 export PATH=$PATH:/sbin:/usr/sbin
 
 #disable wifi
-if lsmod | grep -q sdio_wifi_pwr ; then 
+if lsmod | grep -q sdio_wifi_pwr ; then
 	wlarm_le -i eth0 down
 	ifconfig eth0 down
 	/sbin/rmmod -r dhd