Created attachment 8727 patch to resolve brightness and notification update It's not really a bug file but a patch that maybe smarter people can use resolve these problems (two of them) 1. When using Fn + brightness_down key the screen goes black after the lowest possible setting (it should remain at the lowest setting). 2. The popup notification that appears when using the Fn + brightness +/- keys doesn't update the brightness percent
Can confirm, the lowest brightness setting turns off the backlight. This can be dangerous if the user has no way of increasing it again (such as dedicated keys) Developers are not quite sure how to handle this, see https://bugs.freedesktop.org/show_bug.cgi?id=93643 Interestingly, Xfce4 already has some support for this, see power-manager-button.c: /* Some laptops (and mostly newer ones with intel graphics) can turn off the * backlight completely. If the user is not careful and sets the brightness * very low using the slider, he might not be able to see the screen contents * anymore. Brightness keys do not work on every laptop, so it's better to use * a safe default minimum level that the user can change via the settings * editor if desired. */ gint32 brightness_min_level; But this appears to be extremely well hidden. I could not figure out which setting to modify or add. Also, since this is in power-manager-button.c, I'm unsure if this also covers brightness key events. Please expose this option in the Power Manager setting screen. This is quite an important setting, and "hidden" settings are becoming too ubiquitous in Xfce.
This option is already present and I have added it to the documentation as haarp is right, it may be a little too hidden: https://docs.xfce.org/xfce/xfce4-power-manager/preferences#hidden_settingminimum_brightness_value
Thanks, Simon. brightness-slider-min-level works as intended :) I still think this should be exposed in the settings, but I suppose this works too.