for ubuntu 16.04 on HP pavilion dv6 and Nvidia Graphic driver, the problem is the same.
xbacklight -set 100 ----> NOT WORKS xrandr --output LVDS-0 --set Backlight 100 ----> NOT WORKS xrandr --output LVDS-0 --brightness 1 ----> WORKS(IT HAS A DIFFERENT EFFECT!) echo 1 |sudo tee /sys/class/backlight/acpi_video0/brightness ----> WORKS -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1054298 Title: xbacklight doesn't work, but xrandr does and so does /sys/class/backlight To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1054298/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
