this post was submitted on 27 Nov 2023
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Linux
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Typically their is some sort of low-level knob in
/sys(tryfind /sys | grep backlight) which can be used to set it to any value. Be careful playing around though because0is often completely off and it can be hard to set it back. (Although a reboot should fix it if nothing tries to be clever and preserve it at shutdown.)With my code, the lowest brightness setting should be closer to the minimum supported by the screen. There are some limitations with this because some screens become flickery at very low brightness levels. You might be able to circumvent the lower limit by using something other than the gnome settings daemon to set the brightness.