[systemd-bugs] [Bug 66367] Provide handle for ACPI to change backlight brightness, similiar to other power-related ACPI events

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66367

--- Comment #5 from Bastien Nocera <bugzilla at hadess.net> ---
The brightness changes should be per-output, and there's no way that you can
adequately do that in the console, without a display manager of some sort, that
would direct the backlight changes to the correct output.

Xorg drivers mostly use libbacklight[1] nowadays for that purpose, ensuring
that they do not trample on each other (there might be multiple brightness
controls for each output, and none for others).

[1]: http://cgit.freedesktop.org/libbacklight/

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