total 0
-r--r--r-- 1 root root 4.0K Mar 15 09:58 actual_brightness
-rw-r--r-- 1 root root 4.0K Mar 15 09:58 bl_power
-rw-r--r-- 1 root root 4.0K Mar 15 09:58 brightness
lrwxrwxrwx 1 root root    0 Mar 15 09:58 [0m[01;36mdevice[0m -> [01;34m../../../LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/device:06[0m[K/
-r--r--r-- 1 root root 4.0K Mar 15 09:58 max_brightness
drwxr-xr-x 2 root root    0 Mar 15 09:58 [01;34mpower[0m/
lrwxrwxrwx 1 root root    0 Mar 15 09:58 [01;36msubsystem[0m -> [01;34m../../../../class/backlight[0m/
-rw-r--r-- 1 root root 4.0K Mar 15 09:57 uevent
[m