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--- notes:backlight [2022/12/09 10:09] – created Sean Rhone
+++ notes:backlight [2024/08/13 21:34] (current) – removed Sean Rhone
@@ Line 1: / Line 1: @@
-====== Backlight ======
-  * The following commands with an asterisk expect only one backlight controller at ''/sys/class/backlight''
-  * This was only tested on one laptop with ''intel_backlight''
-  * See [[#power_management|Power Management notes]] on how to add backlight changes to a udev script
-  * See [[https://wiki.archlinux.org/index.php/backlight|backlight]] for more details
-====== Controller Name ======
-****
-  ls '/sys/class/backlight'
-====== Query Current Brightness ======
-****
-  cat '/sys/class/backlight/'*'/brightness'
-====== Query Max Brightness ======
-****
-  cat '/sys/class/backlight/'*'/max_brightness'
-====== Set Custom Brightness ======
-  * Change ''376'' to desired brightness
-  * Desired brightness **must** be under ''max_brightness'' value
-  echo "376" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null'
-====== Set Max Brightness ======
-****
-  echo "$(cat '/sys/class/backlight/'*'/max_brightness')" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null'