Slackware 14.1 - xbacklight does not work with mesa drivers

mlpa · 11-18-2013, 05:57 AM

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.

Suggestions?

TobiSGD · 11-19-2013, 02:51 PM

While xbacklight is not working fort me either (which doesn't matter, since Slackware now supports my Fn brightness keys) I have no problem at all with xfce4-power-manager, it sets the brightness as intended. I would recommend to file a bug against your issues, the AMD driver developers are helpful and react fast to bug reports.