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

100

 

To change brightness

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

 

The default brightness is 50.

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