mirror of https://gitlab.freedesktop.org/upower/power-profiles-daemon.git synced 2026-05-06 10:18:07 +02:00

read-only mirror of https://gitlab.freedesktop.org/upower/power-profiles-daemon

Find a file

Bastien Nocera 09283442cd main: Add intel_pstate-based driver Intel's p-state driver provides "Energy vs. Performance" hints that user-space can use to set a policy for the P-state selection logic. On all supported Intel systems that should have a range from "power" to "performance" with steps in between. Depending on the selected profile, performance or power will be selected for the equivalent power profile. See https://www.kernel.org/doc/html/v4.12/admin-guide/pm/intel_pstate.html#energy-vs-performance-hints and https://www.kernel.org/doc/html/v4.12/admin-guide/pm/intel_pstate.html#turbo-p-states-support Closes: #13		2020-09-04 15:01:30 +02:00
data	data: Make service D-Bus activatable	2020-08-10 11:42:31 +02:00
docs	docs: Fix copyright year	2020-07-24 11:23:44 +02:00
src	main: Add intel_pstate-based driver	2020-09-04 15:01:30 +02:00
tests	main: Get rid of "SelectedProfile" property	2020-08-12 16:55:58 +02:00
.editorconfig	power-profiles-daemon	2020-07-10 17:29:23 +02:00
.gitignore	power-profiles-daemon	2020-07-10 17:29:23 +02:00
.gitlab-ci.yml	ci: Add packages for integration tests	2020-07-16 17:07:10 +02:00
COPYING	power-profiles-daemon	2020-07-10 17:29:23 +02:00
meson.build	data: Make service D-Bus activatable	2020-08-10 11:42:31 +02:00
meson_options.txt	power-profiles-daemon	2020-07-10 17:29:23 +02:00
NEWS	power-profiles-daemon	2020-07-10 17:29:23 +02:00
README.md	main: Add fake performance driver	2020-08-12 15:31:54 +02:00

README.md

power-profiles-daemon

Makes power profiles handling available over D-Bus.

Installation

$ meson _build -Dprefix=/usr
$ ninja -v -C _build install

It requires libgudev and systemd.

Introduction

power-profiles-daemon offers to modify system behaviour based upon user-selected power profiles. There are 3 different power profiles, a "balanced" default mode, a "power-saver" mode, as well as a "performance" mode. The first 2 of those are available on every system. The "performance" mode is only available on select systems and is implemented by different "drivers" based on the system or systems it targets.

In addition to those 2 or 3 modes (depending on the system), "actions" can be hooked up to change the behaviour of a particular device. For example, this can be used to disable the fast-charging for some USB devices when in power-saver mode.

GNOME's Settings and shell both include interfaces to select the current mode, but they are also expected to adjust the behaviour of the desktop depending on the mode, such as turning the screen off after inaction more aggressively when in power-saver mode.

Note that power-profiles-daemon does not save the currently active profile across system restarts and will always start with the "balanced" profile selected.

Debugging

You can now check which mode is in use, and which ones are available by running:

gdbus introspect --system --dest net.hadess.PowerProfiles --object-path /net/hadess/PowerProfiles

You can change the selected profile by running (change power-saver for the chosen profile):

gdbus call --system --dest net.hadess.PowerProfiles --object-path /net/hadess/PowerProfiles --method org.freedesktop.DBus.Properties.Set 'net.hadess.PowerProfiles' 'SelectedProfile' "<'power-saver'>"

If that doesn't work, please file an issue, make sure any running power-profiles-daemon has been stopped: systemctl stop power-profiles-daemon.service and attach the output of: G_MESSAGES_DEBUG=all /usr/libexec/power-profiles-daemon running as root.

Testing

If you don't have hardware that can support the performance mode, you can manually run the power-profiles-daemon binary as root with the environment variable POWER_PROFILE_DAEMON_FAKE_DRIVER set to 1. For example: