apm_get_event(9)

🦋 apm_get_event(9) — Kernel API Manual 🦋

okay so bestie, welcome to apm_get_event. This is a kernel API manual page, and honestly it's giving "small function, big lore". Sit down, hydrate, and let's get into it 💅

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✨ NAME ✨

apm_get_event — get an APM event from the BIOS 🫶

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🌸 SYNOPSIS 🌸

int apm_get_event (apm_event_t *event , apm_eventinfo_t *info );

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🎀 ARGUMENTS 🎀

• event — pointer to the event 💖 like, this is where the event itself goes.
• info — pointer to the event information ✨ this one's for the extra deets.

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💜 DESCRIPTION 💜

So here's the vibe: the APM BIOS provides polled information for event reporting. No cap, polled — you go ask, it doesn't come tell you 🌈

The BIOS expects to be polled at least every second when events are pending. That's the rule, bestie. When a message is found, the caller should keep polling until no more messages are present — like, keep going until the queue is empty, periodt 🙈

⚠️ But wait — this causes problems on some laptops 👀 Specifically, a suspend event notification is not cleared until it is acknowledged. So yeah, that's a real gotcha, not me being dramatic for once 💀

Additional information is returned in the info pointer — providing that APM 1.2 is in use. If no messages are pending, the value 0x80 is returned, which means (No power management events pending) 🧚

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🔥 SEE ALSO 🔥

Kernel file ./arch/x86/kernel/apm_32.c — plus the whole friend group:

• 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)
• set_power_state(9)
• set_system_power_state(9)
• apm_do_idle(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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⭐ that's the whole page, you ate that ⭐ And now the cute sign-off: this lil masterpiece lives in ./arch/x86/kernel, it's dated October 2026, and it's filed under apm_get_event(9). slay 💅💖