I've bougth a Lenovo Thinkpad 13 and I've installed Fedora 26 with XFCE.

But I've a problem with the brigthness and the hotkey to increase or decrease this. I've the no problem to increase it with the xfce4-power-manager-settings with the slider but if I use the hotkey the slider (see picture) won't move and doesn't update the brightness. Notification Slide

Anyone know what's the command used xfce4-power-manager-settings or how can I find it?

Edit: I've installed brightnessctl and put a shortcut for the Fn key but the slider (see picture) won't move


You need to check that you're using the Fn button to activate the settings. If this is not the case, you need to configure your ACPI events. Here is a link where you can learn how to configure it: https://www.howtoforge.com/manage-your-laptop-hotkeys-on-fedora

  • I'm using the Fn button, and the notification (like in the picture ) appears but the brightness won't increase – Sven Oct 31 '17 at 15:48
  • You can open the "xfce4-settings-editor" using a terminal, then go to the "xfce4-power-manager" tab and check the "handle-brightness-keys" option. This worked for me. – linuscl Apr 29 '18 at 16:50

echo/printf command to /sys/class/backlight/*/brightness

  • Thanks, and how can I link this command with th Fn button? – Sven Oct 31 '17 at 16:06

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