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Tray bar app to temporarily inhibit screensaver and sleep mode.

Project Description

Caffeine is a little daemon that sits in your systray, and prevents the screensaver from showing up, or the system from going to sleep. It does so when an application is fullscreened (eg: youtube), or when you click on the systray icon (which you can do, when, eg: reading).

This is a fork of Caffeine 2.4, since later versions dropped support for the systray icon in favour of only automatic detection of fullscreen apps only, which resulted rather controversial.

The intention of this fork is to also evolve on its own, not only fixing issues, but also implemented missing features, when relevant.

Caffeine-ng was shortly know as Taurine, a play on its successor’s name, since taurine is a known stimulant, commonly found in energy drinks. However, this name did not last, since the artwork would not match adequately, and changing it was undesirable.

System requirements

  • Either a screensaver that implements the org.freedesktop.ScreenSaver API (this includes KDE, amongst others) API, gnome-screensaver, XSS and/or DPMS, xautolock.
  • Python 3

See requirements.txt for required python packages


To manually install caffeine-ng, run:

python build
sudo python install
sudo glib-compile-schemas /usr/share/glib-2.0/schemas

Or pre-packaged:

  • On ArchLinux, caffeine-ng is available at the AUR.

To have Caffeine-ng run on startup, add it to your System Settings => Startup Programs list.


Copyright (C) 2009 The Caffeine Developers Copyright (C) 2014-2017 Hugo Osvaldo Barrera <>

Caffeine-ng is distributed under the GNU General Public License, either version 3, or (at your option) any later version. See LICENCE for details.

The Caffeine-ng status icons are Copyright (C) 2014 mildmojo (, and distributed under the terms of the GNU Lesser General Public License, either version 3, or (at your option) any later version. See LGPL.

The Caffeien-ng SVG shortcut icons are Copyright (C) 2009 Tommy Brunn (, and distributed under the terms of the GNU Lesser General Public License, either version 3, or (at your option) any later version. See LGPL.


  • To run: ./bin/caffeine
  • To compile translations: ./update_translations

If you want to test out a translation without changing the language for the whole session: “LANG=ru_RU.UTF-8 ./bin/caffeine” (Replace ru_RU.UTF-8 with whatever language you want to use. You will need to a language pack for the specific language) Be aware that some stock items will not be translated unless you log in with a given language.

Release History

Release History

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
caffeine_ng-3.4.0-py3-none-any.whl (172.2 kB) Copy SHA256 Checksum SHA256 py3 Wheel Jan 26, 2017
caffeine-ng-3.4.0.tar.gz (157.4 kB) Copy SHA256 Checksum SHA256 Source Jan 26, 2017

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