---
name: "intpm"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/intpm"
---

# intpm(4)

Intel PIIX4 Power Management controller driver

## NAME

**intpm** – Intel PIIX4 Power Management controller driver

## SYNOPSIS

**device** **pci** **device** **smbus** **device** **smb** **device** **intpm**

## DESCRIPTION

The **intpm** driver provides access to Intel PIIX4 compatible Power Management controllers. Currently, only [smbus(4)](/smbus/4.md) controller function is implemented.

## HARDWARE

The **intpm** driver supports the following chipsets:

- Intel 82371AB/82443MX

- ATI IXP400

- AMD SB600/7x0/8x0/9x0 southbridges

- AMD Axx/Hudson/Bolton FCHs

- AMD FCH integrated into Family 15h Models 60h-6Fh, 70h-7Fh Processors

- AMD FCH integrated into Family 16h Models 00h-0Fh, 30h-3Fh Processors

## SEE ALSO

[amdpm(4)](/amdpm/4.md), [amdsmb(4)](/amdsmb/4.md), [ichsmb(4)](/ichsmb/4.md), [smb(4)](/smb/4.md), [smbus(4)](/smbus/4.md)

## HISTORY

The **intpm** driver first appeared in FreeBSD 3.4.

## AUTHORS

This manual page was written by Takanori Watanabe ⟨*takawata@shidahara1.planet.sci.kobe-u.ac.jp*⟩.

## BUGS

This device requires IRQ 9 exclusively. To use this, you should enable ACPI function in BIOS configuration, or PnP mechanism assigns conflicted IRQ for PnP ISA card. And do not use IRQ 9 for Non-PnP ISA cards.