---
name: "acpivout"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/acpivout"
---

# acpivout(4)

ACPI video output

## NAME

**acpivout** – ACPI video output

## SYNOPSIS

**acpivout\* at acpivideo?**

## DESCRIPTION

The **acpivout** driver supports brightness adjustment. It allows brightness to be adjusted either using a brightness hotkey or the [wsconsctl(8)](/wsconsctl/8.md) variable “display.brightness”.

## SEE ALSO

[acpi(4)](/acpi/4.md), [acpivideo(4)](/acpivideo/4.md), [intro(4)](/intro/4.md), [wsconsctl(8)](/wsconsctl/8.md)

## HISTORY

The **acpivout** driver first appeared in OpenBSD 4.6.

## AUTHORS

The **acpivout** driver was written by Paul Irofti ⟨*paul@irofti.net*⟩.