lcd_system_halt(9)

💖 lcd_system_halt(9) 💖

okay bestie, welcome to the Kernel API Manual corner, where we're doing a vibe check on lcd_system_halt(9) and yes, it's giving very niche kernel shutdown main character energy ✨

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🌸 NAME 🌸

The NAME line is literally just lcd_system_halt - and then... nothing else. No description, no little explainer, just a dash and mystery. Iconic minimalism, honestly 💅

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✨ SYNOPSIS ✨

int lcd_system_halt (struct notifier_block *nb , unsigned long event ,
void *buf );

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🎀 ARGUMENTS 🎀

• nb — pointer to the notifier_block structure 🫶
• event — the event, and the values are SYS_RESTART, SYS_HALT or SYS_POWER_OFF 🔥
• buf — pointer to a buffer (not used), so yeah, it's there but it's not doing anything 🙈

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💅 DESCRIPTION 💅

So this function is called by the reboot notifier chain at shutdown. It stops all LED/LCD activities. That's the whole assignment, no cap: shutdown time comes, the reboot notifier chain calls it, and all the LED/LCD activity gets shut down. Periodt 💀✨

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🦋 SEE ALSO 🦋

• Kernel file ./drivers/parisc/led.c
• lcd_print(9)
• led_ASP_driver(9)
• led_LASI_driver(9)
• led_LCD_driver(9)
• register_led_driver(9)
• early_led_init(9)
• register_led_regions(9)

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signing off from ./drivers/parisc, dated October 2026, for lcd_system_halt(9) — source/version and date noted, mwah 💋✨