diff --git a/lynx/overlay/frameworks/base/core/res/res/values/config.xml b/lynx/overlay/frameworks/base/core/res/res/values/config.xml
index 3ccb5ff..b38878a 100644
--- a/lynx/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/lynx/overlay/frameworks/base/core/res/res/values/config.xml
@@ -84,6 +84,20 @@
     <!-- Default refresh rate while the device has high brightness mode enabled for HDR. -->
     <integer name="config_defaultRefreshRateInHbmHdr">60</integer>
 
+    <!-- Switch to fixed refresh rate when display brightness setting is
+         equal or more than this value -->
+    <integer-array name="config_highDisplayBrightnessThresholdsOfFixedRefreshRate">
+        <!-- System brightness for 500 nits: round((500-2)/(1000-2)*(255-1)+1) = 128 -->
+        <item>128</item> <!--100% UI normal brightness -->
+    </integer-array>
+
+    <integer-array name="config_highAmbientBrightnessThresholdsOfFixedRefreshRate">
+        <item>50000</item>
+    </integer-array>
+
+    <!-- default refresh rate in the high zone defined by brightness and ambient thresholds -->
+    <integer name="config_fixedRefreshRateInHighZone">60</integer>
+
     <!-- Array of light sensor LUX values to define our levels for auto backlight brightness support.
       The N entries of this array define N  1 zones as follows:
          Zone 0:        0 <= LUX < array[0]