Slackware 14.1 - xbacklight does not work with mesa drivers
Hello, xbacklight is not working with mesa 3d drivers, more specifically ati drivers. I can manually set the brightness using the /sys/class/acpi_video0 device. However xbacklight returns "No outputs have backlight property".
Another issue, xfce-power-manager does not decrease the backlight by itself.
It may be related with the xbacklight issue.