acpi_subsys_suspend(9)

✨ acpi_subsys_suspend(9) ✨

okay so real talk, bestie — you're reading a page from the Kernel API Manual, and it's all about acpi_subsys_suspend. yes that's a mouthful, no i will not be pronouncing it out loud 💅

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🌸 NAME 🌸

acpi_subsys_suspend — literally just runs the device driver's suspend callback. that's the whole vibe. no cap. 🫶

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🎀 SYNOPSIS 🎀

int acpi_subsys_suspend (struct device *dev );

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🦋 ARGUMENTS 🦋

• dev — the device you're handling. that's it, that's the arg. give it a device, she'll do her thing 💖

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⭐ DESCRIPTION ⭐

so here's the tea ☕ — this function follows PCI and resumes devices from runtime suspend before running their system suspend callbacks.

BUT (and this is the important but, don't skip it 🙈) there's an exception, and there are two conditions that both have to hold for it:

• the driver can cope with runtime-suspended devices during system suspend, and
• there are no ACPI-specific reasons for resuming them.

if both of those are true? then she doesn't do the resume-first thing. if either one fails — or honestly if you're not sure — resume happens first. periodt. 🔥

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👑 SEE ALSO 👑

the whole squad lives in the kernel file ./drivers/acpi/device_pm.c and honestly, it's giving extended family reunion. here's everybody:

• acpi_power_state_string(9)
• acpi_device_get_power(9)
• acpi_device_set_power(9)
• acpi_device_fix_up_power(9)
• acpi_device_fix_up_power_extended(9)
• acpi_device_fix_up_power_children(9)
• acpi_dev_power_up_children_with_adr(9)
• acpi_dev_power_state_for_wake(9)
• acpi_add_pm_notifier(9)
• acpi_remove_pm_notifier(9)
• acpi_dev_pm_get_state(9)
• acpi_pm_device_sleep_state(9)
• acpi_pm_notify_work_func(9)
• acpi_device_wakeup_enable(9)
• acpi_device_wakeup_disable(9)
• acpi_pm_set_device_wakeup(9)
• acpi_dev_pm_low_power(9)
• acpi_dev_pm_full_power(9)
• acpi_dev_suspend(9)
• acpi_dev_resume(9)
• acpi_subsys_runtime_suspend(9)
• acpi_subsys_runtime_resume(9)
• acpi_subsys_prepare(9)
• acpi_subsys_complete(9)
• acpi_subsys_suspend_late(9)
• acpi_subsys_suspend_noirq(9)
• acpi_subsys_resume_noirq(9)
• acpi_subsys_resume_early(9)
• acpi_subsys_resume(9)
• acpi_subsys_freeze(9)
• acpi_subsys_restore_early(9)
• acpi_subsys_poweroff(9)
• acpi_subsys_poweroff_late(9)
• acpi_subsys_poweroff_noirq(9)
• acpi_dev_pm_detach(9)
• acpi_dev_pm_attach(9)
• acpi_storage_d3(9)
• acpi_dev_state_d0(9)

like i said. reunion. iconic behavior, truly 🌈

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and that's the whole page, bestie!! 🎀 this gem comes to you from ./drivers/acpi, dated October 2026, and it goes by acpi_subsys_suspend(9). go take a nap now, you've earned it 😭💜