total 0
drwxr-xr-x 3 root root    0 Mar 25 13:12 .
drwxr-xr-x 4 root root    0 Mar 25 13:12 ..
-r--r--r-- 1 root root 4096 Mar 25 13:15 actual_brightness
-rw-r--r-- 1 root root 4096 Mar 25 13:15 bl_power
-rw-r--r-- 1 root root 4096 Mar 25 13:15 brightness
lrwxrwxrwx 1 root root    0 Mar 25 13:15 device -> ../../card0-LVDS-1
-r--r--r-- 1 root root 4096 Mar 25 13:15 max_brightness
drwxr-xr-x 2 root root    0 Mar 25 13:15 power
lrwxrwxrwx 1 root root    0 Mar 25 13:12 subsystem -> ../../../../../../../class/backlight
-r--r--r-- 1 root root 4096 Mar 25 13:12 type
-rw-r--r-- 1 root root 4096 Mar 25 13:12 uevent