LInux Power Management 办法总结

最新推荐文章于 2025-07-22 20:44:16 发布

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本文总结了在RHEL7系统中如何进行S3电源管理，由于Gnome3缺少S3/S4选项，重点介绍了使用systemctl suspend实现S3状态的详细流程，涉及systemd-logind、systemd和systemd-sleep等多个组件的交互。同时提到，可以通过不同的方式在这些环节设置钩子，但具体方法的文档尚不完善，特别是systemd层面需要进一步了解。

因为Gnome3中没有S3/S4选项，RHEL7做S3 一定要用： systemctl suspend

不用echo 命令，因为系统调用不同：

Technical details

XFCE(GUI), or systemctl suspend -> systemd-logind -> systemd -> systemd-sleep -> linux kernel.

It's possible to hook into this in different ways, in each of the three different links that start systemd :). Your script in /etc is run by something installed in one of the latter two. See man systemd-sleep, and man systemd.special. Unfortunately the exact ways you use these hooks are not documented very well right now. (The systemd level in particular is in need of a bit of love).

As for the first possible hook: the logind "inhibitor" system is intended for use by GUI apps. It involves receiving DBus signals.