Created attachment 6657 Use the kernel-supplied backlight type rather than a whitelist This is a patch to replace the list of interfaces in backlight_helper_get_best_backlight() with the same logic as here: https://git.gnome.org/browse/gnome-settings-daemon/tree/plugins/power/gsd-backlight-linux.c#n61 i.e. grab the first interface of type "firmware" and fall back on the first interface of type "platform" and finally "raw". Here's the commit that replaced the list of interfaces in the GNOME source, and the rationale: https://git.gnome.org/browse/gnome-settings-daemon/commit/plugins/power/gsd-backlight-helper.c?id=fff09fe17eecb9314962d119a5c5b4e865f2570d I tested it on my machine (Eee PC 1201N) and it works. Here's someone with the same problem on different hardware: http://forum.xfce.org/viewtopic.php?id=9547
Thanks for the patch, pushed to master in: http://git.xfce.org/xfce/xfce4-power-manager/commit/?id=36b2c96e91feeb118a4e8170c5d608795f00d5f2
Thanks!