ENUM BACKLIGHT_UPDATE_REASON(9)

💖 enum backlight_update_reason(9) 💖

okay bestie, so this is a page from the Kernel API Manual — yes, that's enum backlig...pdate_reason(9) if you're squinting at the truncated header, and we're about to make it make sense. sit down, hydrate, let's go ✨

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🌸 NAME 🌸

enum backlight_update_reason — literally just tells you what method was used to update the backlight. that's it. that's the whole vibe check 👑

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🎀 SYNOPSIS 🎀

here's the shape of it, copy it exactly bestie, no freestyling:

enum backlight_update_reason {
    BACKLIGHT_UPDATE_HOTKEY ,
    BACKLIGHT_UPDATE_SYSFS

};

like, two constants, one enum, immaculate energy 💅

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✨ Constants ✨

• BACKLIGHT_UPDATE_HOTKEY — the backlight was updated using a hot-key. you pressed a key, the screen got brighter, the universe said slay 🔥
• BACKLIGHT_UPDATE_SYSFS — the backlight was updated using sysfs. not a keypress, the filesystem did it, iconic in a different way 🦋

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💜 Description 💜

so the whole point: a driver indicates the method (reason) used for updating the backlight when calling backlight_force_update. that's the tea, that's the lore, that's the entire function of this enum 🫶

like, backlight_force_update needs to know why the backlight changed, and this enum is the little label it gets handed. no cap.

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🌈 SEE ALSO 🌈

go read these next, bestie, they're all in Kernel file ./include/linux/backlight.h — a whole squad, honestly:

• enum backlight_type(9)
• struct backlight_ops(9)
• struct backlight_properties(9)
• struct backlight_device(9)
• backlight_update_status(9)
• backlight_enable(9)
• backlight_disable(9)
• backlight_is_blank(9)
• backlight_get_brightness(9)
• bl_get_data(9)

that's the full roster, don't skip any, they're all main character energy in their own way 👑

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aaaand that's the page!! 🎀 this came out of ./include/linux, dated October 2026, and it's filed under enum backlig...pdate_reason(9) — so if you ever forget which enum told the kernel why the backlight changed, you know exactly where to look. mwah 💋✨🍓