BACKLIGHT(8)

✨ backlight(8) — configure backlight hardware ✨

okay bestie, gather round 🫶 this is the backlight(8) page from the System Manager's Manual, and it's literally here to help you configure backlight hardware. brightness but make it Unix, periodt. 💅

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🌸 NAME 🌸

backlight — configure backlight hardware.

🦋 SYNOPSIS 🦋

backlight [-q] [-f device]
backlight [-q] [-f device] -i
backlight [-f device] value
backlight [-f device] incr|+ [value]
backlight [-f device] decr|- [value]

🎀 DESCRIPTION 🎀

The backlight utility can be used to configure brightness levels for registered backlights. yes bestie, it's giving glow-up controls ✨

Called without any arguments, it will print the current brightness level of the first registered backlight. no extra drama, just the number 💅

The options are as follows, and we're keeping every single one:

• -f device — Device to operate on. If not specified, /dev/backlight/backlight0 is used. If an unqualified name is provided, /dev/backlight/ is automatically prepended. lowkey convenient 🫶
• -i — Query information about the backlight: name, type. info dump but make it cute 🎀
• -q — When querying the brightness level, only print the value. no chatter, just the value 💅
• value — Set the brightness level to this value; it must be between 0 and 100. A trailing % is valid. yes, percent signs are allowed, slay 🍓
• incr|+ [value] — The page says “Decrement the backlight level.” If no value is specified, a default of 10 percent is used. okay bestie, that's exactly what it says, keeping it as written 🙈
• decr|- [value] — The page says “Increment the backlight level.” If no value is specified, a default of 10 percent is used. again, exactly as written, no edits 👀

🌈 EXAMPLES 🌈

Show the current brightness level:

$ backlight -f /dev/backlight/backlight0
brightness: 98

so iconic 😭 it literally prints brightness: 98.

🧚 SEE ALSO 🧚

• backlight(9)

💜 HISTORY 💜

The backlight utility appeared in FreeBSD 13.0. vintage-ish but make it current ✨

🍓 AUTHORS 🍓

The backlight utility and this manual page were written by Emmanuel Vadot <manu@FreeBSD.org>. shoutout king 👑

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💖 Debian • July 19, 2022 — that's the footer sign-off for backlight(8), mwah! 💖