---
name: "kacpimon"
section: "8"
platform: "linux"
package: "acpid"
version: "2.0.34-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/kacpimon"
---

# kacpimon(8)

Kernel ACPI Event Monitor

## NAME

kacpimon - Kernel ACPI Event Monitor

## SYNOPSIS

**kacpimon**

## DESCRIPTION

**kacpimon** is a monitor program that connects to three sources of ACPI  events:

-

  1\. /proc/acpi/event\
   2\. netlink\
   3\. the input layer (/dev/input/event\*)

**kacpimon** then reports on what it sees while it is connected.

Use **kacpimon** to make sure your kernel is sending acpi-related events via the three sources mentioned above.

Since both [**acpid**(8)](/acpid/8.md) and **kacpimon** connect to the same sources, be sure to stop [**acpid**(8)](/acpid/8.md) before running kacpimon.  If you are using [**upstart**(7)](/upstart/7.md), use [**initctl**(8)](/initctl/8.md) to stop [**acpid**(8)](/acpid/8.md). If you are using [**systemd**(1)](/systemd/1.md), use [**systemctl**(1)](/systemctl/1.md) to stop [**acpid**(8)](/acpid/8.md). If you aren't using either of those, you can try [**killall**(1)](/killall/1.md) to stop [**acpid**(8)](/acpid/8.md).

Be sure to run **kacpimon** as root or else it won't be able to open /proc/acpi/event or the input layer:

-

  sudo kacpimon

If you want to pipe the output of **kacpimon** to a file, be sure to use the "Esc" key to exit rather than Ctrl-C.  Using Ctrl-C will cause output to be lost.

## FILES

- */proc/acpi/event*

  kernel ACPI event file

- */dev/input/event\**

  input layer event files

## SEE ALSO

[**acpi\_listen**(8)](/acpi_listen/8.md), [**acpid**(8)](/acpid/8.md)

## AUTHOR

Ted Felix \<www.tedfelix.com\>

## TODO

\- Make kacpimon something that actually gets installed?

## LICENSE

kacpimon - Kernel ACPI Event Monitor\
 Copyright (C) 2009-2013  Ted Felix (www.tedfelix.com)

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA Or visit www.gnu.org.