Curtis Wald

Backlight Control

Discussion created by Curtis Wald Employee on May 18, 2011
Latest reply on May 18, 2011 by Robert M Girard

The Backlight brightness can be changed from user space using the /sys interface.


$ ls /sys/devices/platform/mxs-bl.0/backlight/mxs-bl

actual_brightness     brightness    max_brightness subsystem

bl_power                  device         power                uevent



To see what the maximum brightness is:

$ cat /sys/devices/platform/mxs-bl.0/backlight/mxs-bl/max_brightness



To change brightness

$ echo 100 > /sys/devices/platform/mxs-bl.0/backlight/mxs-bl/brightness


The default brightness is 50.