9:09 a.m.
https://fedoraproject.org/wiki/Changes/Power_Profiles_Daemon
== Summary ==
We will install power-profiles-daemon in Fedora Workstation and enable
it by default. power-profiles-daemon allows the user to choose between
optimizing for system performance or battery life.
== Owner ==
* Name: [[User:Hadess| Bastien Nocera]]
* Email: bnocera(a)redhat.com
* Name: [[User:Catanzaro|Michael Catanzaro]]
* Email: mcatanzaro(a)redhat.com
* Name: [[User:Ngompa|Neal Gompa]]
* Email: ngompa13(a)gmail.com
== Detailed Description ==
From the upstream README:
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.
== Feedback ==
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feedback, that is useful to note in this section as well. For
innovative or possibly controversial ideas, consider collecting
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== Benefit to Fedora ==
Shipping power-profiles-daemon enables GNOME to display and offer
users the ability to adjust configuration related to power management
similar to other operating systems, which can improve the quality of
the on-battery experience (with respect to longevity of operating on
battery power).
== Scope ==
* Proposal owners: Add Recommends: power-profiles-daemon to
gnome-control-center package. Add systemd preset to fedora-release.
* Other developers: N/A (not needed for this Change)
* Release engineering: N/A (not needed for this Change)
* Policies and guidelines: N/A (not needed for this Change)
* Trademark approval: N/A (not needed for this Change)
* Alignment with Objectives: Nope.
== Upgrade/compatibility impact ==
power-profiles-daemon will be installed on upgrade to Fedora 35 if
gnome-control-center is installed. Since the default power profile is
the balanced mode, users should not notice performance changes (sans
bugs), but the option to manually select either performance or power
saving mode will now be present.
== How To Test ==
Visit the Power settings panel in gnome-control-center and switch
between performance, balanced, and power save mode. Look for
unexpected behavior changes over long periods of time. For example,
selecting Performance mode should improve system performance but
reduce battery life. Selecting power save mode should reduce
performance but increase battery life. Selecting balanced mode should
not change anything.
The selected power save mode should persist across system reboots.
== User Experience ==
GNOME Control Center will show a new section in the Power page giving
users the option to select power modes:
* Balanced (the default)
* Performance (to maximize performance)
* Power saver (to maximize battery life)
User selection of these profiles will set various tunables to meet the
needs as described in the profiles.
== Dependencies ==
gnome-control-center depends on power-profiles-daemon to offer power
saving options. If not installed, these options will not be present in
the power panel.
== Contingency Plan ==
* Contingency mechanism: we can easily remove the Recommends: in
gnome-control-center or the preset in fedora-release if necessary.
* Contingency deadline: N/A (not a System Wide Change)
* Blocks release? No
== Documentation ==
The only documentation is the upstream project README:
https://gitlab.freedesktop.org/hadess/power-profiles-daemon/-/blob/main/R...
== Release Notes ==
Fedora Workstation now ships with power-profiles-daemon installed and enabled.
--
Ben Cotton
He / Him / His
Fedora Program Manager
Red Hat
TZ=America/Indiana/Indianapolis
9:59 a.m.
On 23/07/2021 16:09, Ben Cotton wrote:
We will install power-profiles-daemon in Fedora Workstation and
enable
it by default. power-profiles-daemon allows the user to choose between
optimizing for system performance or battery life.
Why not TuneD[1] (developed by Red Hat by the way)?
TuneD is a system tuning service for Linux. Features:
- monitors connected devices using the udev device manager
- tunes system settings according to a selected profile
- supports various types of configuration like sysctl, sysfs, or kernel
boot command line parameters, which are integrated in a plug-in architecture
- supports hot plugging of devices and can be controlled from the
command line or through D-Bus, so it can be easily integrated into
existing administering solutions: for example, with Cockpit
- stores all its configuration cleanly in one place – in the TuneD
profile – instead of having configuration on multiple places and in
custom scripts
[1]: https://tuned-project.org/
--
Sincerely,
Vitaly Zaitsev (vitaly(a)easycoding.org)
10:16 a.m.
Hi, apologies for this change being submitted a little late. The change
has actually been fully implemented for a couple months now, and
already approved by the Workstation WG (it only affects Workstation),
but we feel a change proposal is important for documentation and
promotion purposes.
On Fri, Jul 23 2021 at 04:59:25 PM +0200, Vitaly Zaitsev via devel
<devel(a)lists.fedoraproject.org> wrote:
On 23/07/2021 16:09, Ben Cotton wrote:
> We will install power-profiles-daemon in Fedora Workstation and
> enable
> it by default. power-profiles-daemon allows the user to choose
> between
> optimizing for system performance or battery life.
Why not TuneD[1] (developed by Red Hat by the way)?
Hi, there is an answer here:
https://gitlab.freedesktop.org/hadess/power-profiles-daemon#tuned-and-tlp
Michael
10:35 a.m.
On 23/07/2021 17:16, Michael Catanzaro wrote:
Hi, there is an answer here:
https://gitlab.freedesktop.org/hadess/power-profiles-daemon#tuned-and-tlp
Both are good projects to use for the purpose of experimenting with
particular
settings to see if they'd be something that can be implemented by default,
or to put some fine-grained, static, policies in place on server-type workloads
which are not as fluid and changing as desktop workloads can be.
Instead of adding new desktop-oriented profiles for the TuneD daemon,
they are implementing another daemon from scratch.
Tuned works fine on desktops with custom profiles like this:
[main]
summary=Optimize for Linux gaming
include=desktop
[cpu]
governor=performance
energy_perf_bias=performance
End users are able to switch between profiles with tuned-adm (CLI) or
tuned-switcher (GUI).
--
Sincerely,
Vitaly Zaitsev (vitaly(a)easycoding.org)
4:42 p.m.
On Fri, Jul 23 2021 at 05:35:11 PM +0200, Vitaly Zaitsev via devel
<devel(a)lists.fedoraproject.org> wrote:
End users are able to switch between profiles with tuned-adm (CLI)
or
tuned-switcher (GUI).
So to be clear, power-profiles-daemon has integration into
gnome-control-center, not an extra app. gnome-settings-daemon
integration is incoming, to automatically temporarily switch to battery
saving mode when on low battery. If tuned wants to be an alternative,
it would need a compatible D-Bus API.
6:46 a.m.
On 23/07/2021 23:42, Michael Catanzaro wrote:
If tuned wants to be an alternative, it would need a compatible D-Bus
API.
TuneD already has a powerful D-Bus API. tuned-adm and tuned-switcher
uses it.
gnome-control-center should add integration with TuneD and not vice versa.
--
Sincerely,
Vitaly Zaitsev (vitaly(a)easycoding.org)
5:20 a.m.
On Mon, Jul 26, 2021 at 6:15 AM Vitaly Zaitsev via devel
<devel(a)lists.fedoraproject.org> wrote:
On 23/07/2021 17:16, Michael Catanzaro wrote:
> Hi, there is an answer here:
> https://gitlab.freedesktop.org/hadess/power-profiles-daemon#tuned-and-tlp
> Both are good projects to use for the purpose of experimenting with particular
> settings to see if they'd be something that can be implemented by default,
> or to put some fine-grained, static, policies in place on server-type workloads
> which are not as fluid and changing as desktop workloads can be.
Instead of adding new desktop-oriented profiles for the TuneD daemon,
they are implementing another daemon from scratch.
Tuned works fine on desktops with custom profiles like this:
[main]
summary=Optimize for Linux gaming
include=desktop
[cpu]
governor=performance
energy_perf_bias=performance
End users are able to switch between profiles with tuned-adm (CLI) or
tuned-switcher (GUI).
At this point, both GNOME (40) and KDE Plasma (5.23) have implemented
support for power-profile-daemon's APIs, so we're kind of stuck here.
While I would have preferred to see more investment into the Dynamic
Tuning Daemon (tuned), that's not what happened.
I don't know if the Red Hat Performance group was ever contacted
before power-profiles-daemon development started, but unfortunately,
it doesn't matter now.
--
真実はいつも一つ！/ Always, there's only one truth!
5:09 a.m.
On Fri, Jul 23, 2021 at 10:09:20AM -0400, Ben Cotton wrote:
== Benefit to Fedora ==
Shipping power-profiles-daemon enables GNOME to display and offer
users the ability to adjust configuration related to power management
similar to other operating systems, which can improve the quality of
the on-battery experience (with respect to longevity of operating on
battery power).
Are there any statistics about how much battery life is gained?
Zbyszek
5:25 p.m.
On Fri, Jul 23, 2021 at 10:09:20AM -0400, Ben Cotton wrote:
https://fedoraproject.org/wiki/Changes/Power_Profiles_Daemon
== Summary ==
We will install power-profiles-daemon in Fedora Workstation and enable
it by default. power-profiles-daemon allows the user to choose between
optimizing for system performance or battery life.
Neal kindly informed me that this was actually built for F34 too, and
installing the package is sufficient to get it to show in GNOME Control
Center's Power pane.
Could this be made explicit in the testing instructions, or is the
version in F34 sufficiently different that any feedback from F34 users
will likely not be relevant?
Thanks,
--
Michel Alexandre Salim
profile: https://keyoxide.org/michel@michel-slm.name
12:40 p.m.
On Sat, Jul 24 2021 at 03:25:17 PM -0700, Michel Alexandre Salim via
devel <devel(a)lists.fedoraproject.org> wrote:
Could this be made explicit in the testing instructions, or is the
version in F34 sufficiently different that any feedback from F34 users
will likely not be relevant?
Sure, I'll add it to the instructions.
There is one important behavior difference between F34 and F35: in F34
the setting is nonpersistent, so it gets reset when you reboot.
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participants (6)
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Ben Cotton -
Michael Catanzaro -
Michel Alexandre Salim -
Neal Gompa -
Vitaly Zaitsev -
Zbigniew Jędrzejewski-Szmek