Might this be caused by the little mesh at /sys/class/backlight ?
alex-mayorga@VPCCW1FFXL:~$ ls -la /sys/class/backlight total 0 drwxr-xr-x 2 root root 0 Dec 14 14:33 . drwxr-xr-x 53 root root 0 Dec 14 14:33 .. lrwxrwxrwx 1 root root 0 Dec 14 14:36 nv_backlight -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/drm/card0/card0-LVDS-1/nv_backlight lrwxrwxrwx 1 root root 0 Dec 14 14:36 nvidia_backlight -> ../../devices/virtual/backlight/nvidia_backlight lrwxrwxrwx 1 root root 0 Dec 14 14:36 sony -> ../../devices/virtual/backlight/sony
Might this be caused by the little mesh at /sys/class/ backlight ?
alex-mayorga@ VPCCW1FFXL: ~$ ls -la /sys/class/ backlight pci0000: 00/0000: 00:01.0/ 0000:01: 00.0/drm/ card0/card0- LVDS-1/ nv_backlight virtual/ backlight/ nvidia_ backlight virtual/ backlight/ sony
total 0
drwxr-xr-x 2 root root 0 Dec 14 14:33 .
drwxr-xr-x 53 root root 0 Dec 14 14:33 ..
lrwxrwxrwx 1 root root 0 Dec 14 14:36 nv_backlight -> ../../devices/
lrwxrwxrwx 1 root root 0 Dec 14 14:36 nvidia_backlight -> ../../devices/
lrwxrwxrwx 1 root root 0 Dec 14 14:36 sony -> ../../devices/