apm_do_idle(9)

💤 NAME — apm_do_idle(9)

okay so bestie, this page is from the Kernel API Manual, and the main character is literally apm_do_idle 💅. it’s giving “please let the processor chill” energy, and we’re gonna read it together, no cap.

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✨ SYNOPSIS ✨

int apm_do_idle (void );

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🌸 ARGUMENTS 🌸

• void — no arguments. not a single one. zero. iconic minimalism, honestly 🎀

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🦋 DESCRIPTION 🦋

so this function notifies the BIOS that the processor is idle — and yes, that’s “idle” in the view of the OS, bestie, keep that detail 👑.

it returns -1 in the event that the BIOS refuses to handle the idle request. rude, but okay.

on a success, the function returns 1 if the BIOS did clock slowing, or 0 otherwise. that’s the whole vibe check: -1 = BIOS said no, 1 = clock slowing happened, 0 = success but no clock slowing 🌈.

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💖 SEE ALSO 💖

go read these next, iykyk 👀:

• the kernel file ./arch/x86/kernel/apm_32.c — that’s where the drama lives, fr fr
• apm_error(9)
• __apm_bios_call(9)
• apm_bios_call(9)
• __apm_bios_call_simple(9)
• apm_bios_call_simple(9)
• apm_driver_version(9)
• apm_get_event(9)
• set_power_state(9)
• set_system_power_state(9)
• apm_do_busy(9)
• apm_cpu_idle(9)
• apm_power_off(9)
• apm_enable_power_management(9)
• apm_get_power_status(9)
• apm_engage_power_management(9)
• apm_console_blank(9)

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mwah 💋 — source/version: ./arch/x86/kernel; date: October 2026; manual: Kernel API Manual; page: apm_do_idle(9). periodt. 🫶✨