ACPIFAN(4)

🌸 NAME 🌸

acpifan — ACPI Fan

okay so real talk, bestie: this is the ACPIFAN(4) page from the Kernel Interfaces Manual, and it's all about the ACPI fan driver. It’s giving hardware-but-make-it-cute 💅✨

✨ SYNOPSIS ✨

acpifan* at acpi?

💖 DESCRIPTION 💖

The acpifan device driver supports fans possibly exposed by the BIOS. Even if a system contains only one physical fan, multiple acpifan instances may be present. In such cases each acpifan typically represents an acpitz(4) thermal zone, and the combined state of all instances reveals the speed of the fan. 🌀

The acpifan driver does not support controlling the fan. The current state (on or off) is made available through the envsys(4) API and the envstat(8) command. So yeah, it’s info-only energy, no remote-control fan era. 🫶

🦋 SEE ALSO 🦋

• acpi(4) — the ACPI bestie
• acpitz(4) — the thermal zone bestie

🎀 HISTORY 🎀

The acpifan device driver appeared in NetBSD 6.0. She’s been around, periodt. 👑

🌈 AUTHORS 🌈

Jukka Ruohonen ⟨jruohonen@iki.fi⟩

Shoutout to Jukka Ruohonen ⟨jruohonen@iki.fi⟩ for this one 🫶✨

💀 BUGS 💀

Lowkey a caveat: the acpifan driver does not yet support additional functionality introduced in the ACPI 4.0 specification. Not yet, bestie 😭

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Signing off: this page is from Debian, dated January 9, 2011, and it’s the ACPIFAN(4) page. Byeee 🫶💖🎀