Laptop: Difference between revisions
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A common tool used to save power on laptops is [https://linrunner.de/tlp/index.html TLP], which has sensible defaults for most laptops. To enable TLP you simply just write <code>services.tlp.enable = true;</code> in your <code>configuration.nix</code>. However, if you need a specific configuration, you can do as shown in the example below. | A common tool used to save power on laptops is [https://linrunner.de/tlp/index.html TLP], which has sensible defaults for most laptops. To enable TLP you simply just write <code>services.tlp.enable = true;</code> in your <code>configuration.nix</code>. However, if you need a specific configuration, you can do as shown in the example below. | ||
{{file|configuration.nix|nix|3= | |||
services.tlp = { | services.tlp = { | ||
enable = true; | enable = true; | ||
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# Optional helps save long term battery health | # Optional helps save long term battery health | ||
START_CHARGE_THRESH_BAT0 = 40; # 40 and | START_CHARGE_THRESH_BAT0 = 40; # 40 and below it starts to charge | ||
STOP_CHARGE_THRESH_BAT0 = 80; # 80 and above it stops charging | STOP_CHARGE_THRESH_BAT0 = 80; # 80 and above it stops charging | ||
}; | }; | ||
}; | }; | ||
}} | |||
This example enables TLP and sets the minimum and maximum frequencies for the CPU based on whether it is plugged into power or not. It also changes the CPU scaling governor based on this. | This example enables TLP and sets the minimum and maximum frequencies for the CPU based on whether it is plugged into power or not. It also changes the CPU scaling governor based on this. | ||
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Example of how to configure auto-cpufreq: | Example of how to configure auto-cpufreq: | ||
{{file|configuration.nix|nix|3= | |||
services.auto-cpufreq.enable = true; | services.auto-cpufreq.enable = true; | ||
services.auto-cpufreq.settings = { | services.auto-cpufreq.settings = { | ||
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}; | }; | ||
}; | }; | ||
}} | |||
Alternatively, if you have [[Flakes]] enabled you can also use the flake directly provided by the auto-cpufreq authors to get a more up-to-date version. They offer a detailed explanation how to add it to your system on their [https://github.com/AdnanHodzic/auto-cpufreq?tab=readme-ov-file#nixos GitHub page]. | Alternatively, if you have [[Flakes]] enabled you can also use the flake directly provided by the auto-cpufreq authors to get a more up-to-date version. They offer a detailed explanation how to add it to your system on their [https://github.com/AdnanHodzic/auto-cpufreq?tab=readme-ov-file#nixos GitHub page]. | ||
To summarize:</br> | To summarize:</br> | ||
1) add the flake as an input to your <code>flake.nix</code> file and enable the module: | 1) add the flake as an input to your <code>flake.nix</code> file and enable the module: | ||
{{file|flake.nix|nix|3= | |||
{ | { | ||
inputs = | inputs = | ||
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}; | }; | ||
} | } | ||
}} | |||
2) Then enable it in your <code>configuration.nix</code> file: | |||
{{file|configuration.nix|nix|3= | |||
{ inputs, pkgs, ... }: { | { inputs, pkgs, ... }: { | ||
# ---Snip--- | # ---Snip--- | ||
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# ---Snip--- | # ---Snip--- | ||
} | } | ||
}} | |||
Since v2.0 auto-cpufreq also includes a GUI that lets you temporarily override the CPU frequency governor setting. | Since v2.0 auto-cpufreq also includes a GUI that lets you temporarily override the CPU frequency governor setting. | ||