diff -Nura plymouth-0.9.5~git20220801.eb1b893/src/libply/ply-utils.c plymouth-0.9.5~git20220801.eb1b893_new/src/libply/ply-utils.c
--- plymouth-0.9.5~git20220801.eb1b893/src/libply/ply-utils.c	2022-08-02 21:28:28.000000000 +0800
+++ plymouth-0.9.5~git20220801.eb1b893_new/src/libply/ply-utils.c	2022-08-04 17:51:09.943348306 +0800
@@ -862,7 +862,7 @@
 }
 
 /* The minimum resolution at which we turn on a device-scale of 2 */
-#define HIDPI_LIMIT 192
+#define HIDPI_TWICE_LIMIT 160
 #define HIDPI_MIN_HEIGHT 1200
 
 int
@@ -874,8 +874,20 @@
         int device_scale;
         double dpi_x, dpi_y;
         const char *force_device_scale;
-
         device_scale = 1;
+        #define WIDTH_INCHS (width_mm / 25.4)
+        #define HEIGHT_INCHS (height_mm / 25.4)
+
+        if (width > 0 && height > 0 && width_mm > 0 && height_mm > 0) {
+                ply_trace("screen width is %d mm", width_mm);
+                ply_trace("screen height is %d mm", height_mm);
+                ply_trace("screen width pixels is %d.", width);
+                ply_trace("screen height pixels is %d.", height);
+                dpi_x = (double)width / WIDTH_INCHS;
+                ply_trace("screen width DPI is %lf", dpi_x);
+                dpi_y = (double)height / HEIGHT_INCHS;
+                ply_trace("screen height DPI is %lf", dpi_y);
+        }
 
         if ((force_device_scale = getenv ("PLYMOUTH_FORCE_SCALE")))
                 return strtoul (force_device_scale, NULL, 0);
@@ -894,14 +906,10 @@
             (width_mm == 16 && height_mm == 10))
                 return 1;
 
-        if (width_mm > 0 && height_mm > 0) {
-                dpi_x = (double) width / (width_mm / 25.4);
-                dpi_y = (double) height / (height_mm / 25.4);
-                /* We don't completely trust these values so both
-                 * must be high, and never pick higher ratio than
-                 * 2 automatically */
-                if (dpi_x > HIDPI_LIMIT && dpi_y > HIDPI_LIMIT)
-                        device_scale = 2;
+        if (dpi_x > HIDPI_TWICE_LIMIT && dpi_y > HIDPI_TWICE_LIMIT)
+        {
+                device_scale = 2;
+                ply_trace("When DPI > 160, screen will scale output twice as community want.");
         }
 
         return device_scale;