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# Power Management | ||
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## acpid | ||
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The `acpid` service for [acpid(8)](https://man.voidlinux.org/acpid.8) is | ||
installed and enabled by default. ACPI events are handled by | ||
`/etc/acpi/handler.sh`, which uses [zzz(8)](https://man.voidlinux.org/zzz.8) for | ||
suspend-to-RAM events. | ||
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## elogind | ||
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The `elogind` service is provided by the `elogind` package. By default, | ||
[elogind(8)](https://man.voidlinux.org/elogind.8) listens for, and processes, | ||
ACPI events related to lid-switch activation and the *power*, *suspend* and | ||
*hibernate* keys. This will conflict with the `acpid` service if it is installed | ||
and enabled. Either disable `acpid` when enabling `elogind`, or configure | ||
`elogind` to `ignore` ACPI events in | ||
[logind.conf(5)](https://man.voidlinux.org/logind.conf.5). There are several | ||
configuration options, all starting with the keyword `Handle`, that should be | ||
set to `ignore` to avoid interfering with `acpid`. | ||
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## Power Saving - tlp | ||
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Laptop battery life can be extended by using | ||
[tlp(8)](https://man.voidlinux.org/tlp.8). To use it, install the `tlp` package, | ||
and enable the `tlp` service. Refer to [the TLP | ||
documentation](https://linrunner.de/tlp/) for details. |
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