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72 lines
1.8 KiB
Markdown
72 lines
1.8 KiB
Markdown
# Optimize battery
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1. [TL;DR](#tldr)
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1. [Disable unused services](#disable-unused-services)
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1. [Improve battery performance](#improve-battery-performance)
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1. [Further readings](#further-readings)
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## TL;DR
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```sh
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# Summarize performance of the last boot.
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sudo systemd-analyze
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# Show last boot performance.
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# Also shows the process tree.
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sudo systemd-analyze critical-chain
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# Check power stats.
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sudo 'powertop'
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```
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## Disable unused services
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```sh
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$ sudo systemd-analyze
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Startup finished in 13.129s (firmware) + 5.413s (loader) + 1.746s (kernel) + 7.903s (userspace) = 28.192s
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graphical.target reached after 1.239s in userspace
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$ sudo systemd-analyze critical-chain
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The time when unit became active or started is printed after the "@" character.
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The time the unit took to start is printed after the "+" character.
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graphical.target @1.239s
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└─multi-user.target @1.239s
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└─ModemManager.service @1.154s +84ms
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└─polkit.service @937ms +215ms
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└─basic.target @928ms
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└─sockets.target @928ms
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└─dbus.socket @928ms
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└─sysinit.target @924ms
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└─systemd-backlight@backlight:acpi_video0.service @2.273s +8ms
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└─system-systemd\x2dbacklight.slice @2.272s
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└─system.slice @197ms
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└─-.slice @197ms
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```
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## Improve battery performance
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```sh
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# Enable automatic power management.
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# See `tlpui` on GitHub for UI.
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sudo systemctl enable --now 'tlp.service'
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sudo vim '/etc/tlp.conf'
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# Check power stats.
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sudo 'powertop'
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```
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## Further readings
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- [laptop-mode-tools]
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- [laptop-mode-tools in the Arch Wiki]
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<!--
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Reference
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═╬═Time══
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-->
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<!-- Others -->
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[laptop-mode-tools]: https://www.unixmen.com/laptop-mode-tools-extend-laptop-battery-life/
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[laptop-mode-tools in the arch wiki]: https://wiki.archlinux.org/title/Laptop_Mode_Tools
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