Let's try this

duoqin/files/mtk-kpd.kcm

@@ -18,24 +18,20 @@ key BUTTON_Z {
     ctrl:                               fallback MUTE
 }
 
-key BUTTON_1 {
-    base:                               fallback DPAD_UP
-    alt, meta:                          fallback VOLUME_UP
+key DPAD_UP {
+    base:                               fallback VOLUME_UP
 }
 
-key BUTTON_2 {
-    base:                               fallback DPAD_LEFT
-    alt, meta:                          fallback BRIGHTNESS_DOWN
+key DPAD_LEFT {
+    base:                               fallback BRIGHTNESS_DOWN
 }
 
-key BUTTON_3 {
-    base:                               fallback DPAD_RIGHT
-    alt, meta:                          fallback BRIGHTNESS_UP
+key DPAD_RIGHT {
+    base:                               fallback BRIGHTNESS_UP
 }
 
-key BUTTON_4 {
-    base:                               fallback DPAD_DOWN
-    alt, meta:                          fallback VOLUME_DOWN
+key DPAD_DOWN {
+    base:                               fallback VOLUME_DOWN
 }
 
 key 0 {

duoqin/files/mtk-kpd.kl

@@ -10,28 +10,28 @@ key 10    9
 key 11    0
 
 # DPAD UP
-key 103   BUTTON_1
+key 103   DPAD_UP
 
 # DPAD LEFT
-key 105   BUTTON_2
+key 105   DPAD_LEFT
 
 # DPAD RIGHT
-key 106   BUTTON_3
+key 106   DPAD_RIGHT
 
 # DPAD DOWN
-key 108   BUTTON_4
+key 108   DPAD_DOWN
 
 # BACK
 key 158   BUTTON_X
 
-# STAR
-key 227   ALT_LEFT
-
 # CALL
 key 231   BUTTON_Y
 
 # DPAD CENTER
 key 352   BUTTON_Z
 
+# STAR
+key 227   ALT_LEFT
+
 # POUND
 key 523   CTRL_RIGHT