max brightness is > 255 on X250

1 files changed, 7 insertions, 3 deletions

diff --git a/tp-key-handler b/tp-key-handler
index dd13f4c..3c3856e 100755
--- a/tp-key-handler
+++ b/tp-key-handler
@@ -44,12 +44,16 @@ class KeyhandlerDBUSService(dbus.service.Object):
         with open("/sys/class/backlight/intel_backlight/brightness", "r") as f:
             return int(f.readline().strip())
 
+    def _getMaxBacklight(self):
+        with open("/sys/class/backlight/intel_backlight/max_brightness", "r") as f:
+            return int(f.readline().strip())
+
     def _setBacklight(self, value):
         with open("/sys/class/backlight/intel_backlight/brightness", "w") as f:
             f.write(str(value))
 
     def _showBacklightState(self):
-        state = self._getBacklight() * 100 / 255
+        state = self._getBacklight() * 100 / self._getMaxBacklight()
         self.bnotice.set_hint_int32("value", int(state))
         self.bnotice.set_hint_string("synchronous", "brightness")
         self.bnotice.show()
@@ -135,8 +139,8 @@ class KeyhandlerDBUSService(dbus.service.Object):
     @dbus.service.method('org.elektranox.keyhandler')
     def backlightInc(self):
         brightness = self._getBacklight() + 5
-        if brightness > 255:
-            brightness = 255
+        if brightness > self._getMaxBacklight():
+            brightness = self._getMaxBacklight()
         self._setBacklight(brightness)
         self._showBacklightState()