On Arch Linux on my laptop, I have acpid control the brightness level based on AC plug events. Plugging in gives me max brightness and running on battery sets it at the minimum.My problem is that when I start the laptop, the brightness is always at the highest.  That is, there isn't anything to trigger the brightness change, so it runs with the highest brightness.How can I make it so that the brightness will set correctly on startup?  I was thinking of creating a systemd service as a potential solution, but I have never written one before and I wanted to hold out for any alternative (potentially better) methods before I start.UPDATE: I ended up using a udev rule, I was unaware of its ability to control things like brightness.  I still have to keep acpid, however, since udev is apparently unable to pick up my laptop close event.Anyway, here is the link to the rule I found: https://github.com/Unia/powersave/blob/master/rules/50-powersave.rules
Acpid and Startup Brightness
arch linux;power management;brightness;acpid