[Linux] Optimizing Laptop's Battery

1) TuneD

Fedora made the software called "tuned" as its default power management tool. It can be checked if it is running by typing this command.

sudo systemctl status tuned-ppd

The "ppd" means the tuned is compatible to power-profile-daemon which is replaced.

 

Tuned has some useful profiles which cannot be accessed via graphical tool in Gnome or KDE Plasma. By typing the command below, the available profiles can be identified.

tuned-adm list

My result is below.

Available profiles:
- accelerator-performance     - Throughput performance based tuning with disabled higher latency STOP states
- aws                         - Optimize for aws ec2 instances
- balanced                    - General non-specialized tuned profile
- balanced-battery            - Balanced profile biased towards power savings changes for battery
- desktop                     - Optimize for the desktop use-case
- hpc-compute                 - Optimize for HPC compute workloads
- intel-sst                   - Configure for Intel Speed Select Base Frequency
- latency-performance         - Optimize for deterministic performance at the cost of increased power consumption
- network-latency             - Optimize for deterministic performance at the cost of increased power consumption, focused on low latency network performance
- network-throughput          - Optimize for streaming network throughput, generally only necessary on older CPUs or 40G+ networks
- optimize-serial-console     - Optimize for serial console use.
- powersave                   - Optimize for low power consumption
- throughput-performance      - Broadly applicable tuning that provides excellent performance across a variety of common server workloads
- virtual-guest               - Optimize for running inside a virtual guest
- virtual-host                - Optimize for running KVM guests
Current active profile: throughput-performance

The profile can be changed with this command.

# To desktop profile
sudo tuned-adm profile desktop

Those profiles can be made accessible via Gnome or KDE Plasma's power management setting. However, only three profiles can be selected.

Edit /etc/tuned/ppd.conf

[main]
# The default PPD profile
default=balanced
battery_detection=true
sysfs_acpi_monitor=true

[profiles]
# PPD = TuneD
power-saver=powersave
balanced=balanced
performance=throughput-performance

[battery]
# PPD = TuneD
balanced=balanced-battery

Change the [profiles] section.

More on this, refer to https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/monitoring_and_managing_system_status_and_performance/getting-started-with-tuned_monitoring-and-managing-system-status-and-performance

Chapter 2. Getting started with TuneD | Monitoring and managing system status and performance | Red Hat Enterprise Linux | 9 |

 

Currently I'm testing the dynamic TuneD

2) Powertop

sudo powertop

 

Applying powertop profile to tuned: https://discussion.fedoraproject.org/t/psa-powertop-tuned-better-power-profiles/167861

To see powertop results in html,

sudo powertop -r powertop.html