Adaption for Asus UX303LN

[jv-barsuk]

I adapted the programm for the Asus UX303LN. There were the following issues

• path to the max_brightness file
• number format of the brightness (dec instead of hex)
• I replaced the case with if and ranges
• I adapted the brightness a bit

Can you somehow include this in your project or should I fork it for the UX303LN?

@@ -105,9 +106,9 @@

 int getScreenBacklightMax()
 {
-    int fd = open("/sys/class/backlight/intel_backlight/max_brightness", O_RDONLY);
+    int fd = open("/sys/class/backlight/acpi_video0/max_brightness", O_RDONLY);
     if(fd == -1) {
-        syslog(LOG_ERR, "Error opening /sys/class/backlight/intel_backlight/max_brightness");
+        syslog(LOG_ERR, "Error opening /sys/class/backlight/acpi_video0/max_brightness");
         return 0;
     }

@@ -125,7 +126,7 @@
     char cmd[100];
     int maxScreenBacklight=getScreenBacklightMax(); // could be static if we are sure if it will not be changed at program lifetime
     if (!maxScreenBacklight) maxScreenBacklight=15; // 15 is a default value
-    snprintf(cmd, sizeof(cmd), "echo %d | tee /sys/class/backlight/intel_backlight/brightness", maxScreenBacklight*percent/100);
+    snprintf(cmd, sizeof(cmd), "echo %d | tee /sys/class/backlight/acpi_video0/brightness", maxScreenBacklight*percent/100);
     ret = system(cmd);
     if (ret < 0) {
         syslog(LOG_ERR, "Failed to set screen backlight.");
@@ -189,26 +190,28 @@

     // 0x32 (min illuminance), 0xC8, 0x190, 0x258, 0x320 (max illuminance).
     int als = atoi(strals);
-    syslog(LOG_ERR,"\"%s\"\n", strals);
-    syslog(LOG_ERR,"Illuminance detected: %d\n", als);
+    //printf("\"%s\"\n", strals);
+    //printf("Illuminance detected: %d\n", als);

     float percent = 0;

-    if (50 > als) {
+    switch(als) {
+    case 0x32:
         percent = 10;
-       } else
-    if (200 > als) {
+        break;
+    case 0xC8:
         percent = 25;
-   } else
-    if (400 > als) {
+        break;
+    case 0x190:
         percent = 50;
-   } else
-    if (600 > als) {
+        break;
+    case 0x258:
         percent = 75;
-   } else
-    if (800 > als) {
+        break;
+    case 0x320:
         percent = 100;
-       }
+        break;
+    }

     return percent;
 }
@@ -294,16 +297,16 @@
             //printf("Illuminance percent: %f\n", als);

             if(als <= 10) {
-                setScreenBacklight(30);
+                setScreenBacklight(40);
                 setKeyboardBacklight(100);
             } else if(als <= 25) {
-                setScreenBacklight(50);
+                setScreenBacklight(60);
                 setKeyboardBacklight(0);
             } else if(als <= 50) {
-                setScreenBacklight(65);
+                setScreenBacklight(75);
                 setKeyboardBacklight(0);
             } else if(als <= 75) {
-                setScreenBacklight(80);
+                setScreenBacklight(90);
                 setKeyboardBacklight(0);
             } else if(als <= 100) {
                 setScreenBacklight(100);

[danieleds]

Thanks! I can adapt it.
Can you confirm that /sys/class/backlight/intel_backlight/max_brightness is missing on your PC?

[jv-barsuk]

/sys/class/backlight/intel_backlight/max_brightness is there but /sys/class/backlight/acpi_video0/max_brightness which you are using in your programm is missing on my system.

[danieleds]

Ok!

[nitroxx92]

What about Asus ZenBook UX305?

[Perlover]

If you have Asus UX305 may be my branch of this repo will work at you:
https://github.com/Perlover/Asus-Zenbook-Ambient-Light-Sensor-Controller/tree/asus-ux305