Power Management: Difference between revisions
Add notes on hibernation
imported>Lelgenio (Add workaround for systems that immediatly wakeup after beign suspended) |
(Add notes on hibernation) |
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It is also possible | It is also possible to use the <code>post-resume</code> target directly to make a service. | ||
<syntaxhighlight lang="nix"> | <syntaxhighlight lang="nix"> | ||
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=== | == Hibernation == | ||
Hibernation requires a configured swap device. See [https://nixos.org/manual/nixos/stable/#ch-installation installation instructions] on how to create a swap partition. An example configuration could look like this:<syntaxhighlight lang="nix"> | |||
swapDevices = [ | |||
{ | |||
device = "/dev/hda7"; | |||
} | |||
]; | |||
boot.resumeDevice = "/dev/hda7"; | |||
</syntaxhighlight>Please note that encrypted swap devices or swap files are not yet supported for hibernation. | |||
==== System | Test and use hibernation with following command:<syntaxhighlight lang="nix"> | ||
systemctl hibernate | |||
</syntaxhighlight> | |||
== Tips and tricks == | |||
=== Go into hibernate after specific suspend time === | |||
Using following configuration, your system will go from suspend into hibernate after 1 hour:<syntaxhighlight lang="nix"> | |||
systemd.sleep.extraConfig = '' | |||
HibernateDelaySec=1h | |||
''; | |||
</syntaxhighlight> | |||
== Troubleshooting == | |||
==== System immediately wakes up from suspend ==== | |||
Particularly in some | Particularly in some Gigabyte motherboards with NVMe drives, the system may immediately wake up from being suspended. | ||
This can be worked around by disabling the wakeup triggers for the offending components: | This can be worked around by disabling the wakeup triggers for the offending components: | ||
===== Solution 1: Disabling wakeup triggers for all PCIe devices ===== | ===== Solution 1: Disabling wakeup triggers for all PCIe devices ===== | ||
If you don't need your system to wakeup via PCIe components you can simply disable it for all without needing to | If you don't need your system to wakeup via PCIe components you can simply disable it for all without needing to determine which component is causing problems. | ||
<syntaxhighlight lang="nix"> | <syntaxhighlight lang="nix"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
===== Solution 2: | ===== Solution 2: Disable a common NVMe interface ===== | ||
Specifically on Gigabyte motherboards you can try targetting only the NVMe ports. | Specifically on Gigabyte motherboards you can try targetting only the NVMe ports. | ||
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===== Solution 3: | ===== Solution 3: Disable a single device's wakeup triggers ===== | ||
If you wish to be more granular in what components should no longer be able to wakeup your system you can | If you wish to be more granular in what components should no longer be able to wakeup your system, you can find out which component is causing the wakeup events. | ||
First, list all components and their current wakeup status: | First, list all components and their current wakeup status: | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
You can temporarily toggle a device by | You can temporarily toggle a device by writing its "Device" name back into <code>/proc/acpi/wakeup</code> | ||
<syntaxhighlight lang="sh"> | <syntaxhighlight lang="sh"> | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
And finally use those values in a udev rule: | And finally use those values in a <code>udev</code> rule: | ||
<syntaxhighlight lang="nix"> | <syntaxhighlight lang="nix"> | ||
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''; | ''; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
== See also == | |||
* [[Laptop]] | |||
== External resources == | == External resources == | ||
* {{manual:nixos|sec=#sec-rebooting|chapter=Chapter 23. Rebooting and Shutting Down}} | * {{manual:nixos|sec=#sec-rebooting|chapter=Chapter 23. Rebooting and Shutting Down}} | ||