I have my ASUS X556U with DualBoot between W10 and Debian Jessie, but I need to regulate the brightness.I've been serching in Google and I found xbacklight, but I have a problem while executing it:barreeeiroo@Debian-Diego ~> xbacklight -dec 10No outputs have backlight propertybarreeeiroo@Debian-Diego ~> Then I search in Google more info about the problem, and I found this post, but it causes another problem:barreeeiroo@Debian-Diego ~> sudo ln -s /sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/rtsx_usb_sdmmc.4/leds/mmc0::/brightness  /sys/class/backlight[sudo] password for barreeeiroo: ln: failed to create symbolic link /sys/class/backlight/brightness: Operation not permittedbarreeeiroo@Debian-Diego ~> I've adapted the route to my computerThen I tried to use chmod and chown, but is the same problem.So, my questions are:Is possible to fix that error?Is there any other method to manage brightness in Debian? Thanks
xbacklight not working
debian;display;backlight