Power Management: Difference between revisions
Add notes on hibernation
imported>Samueldr (Created page with "{{expansion}} == Suspend == === Suspend hooks === NixOS provides the {{nixos:option|powerManagement.resumeCommands}} option which defines commands that are added to a globa...") |
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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. | ||
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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. | |||
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 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: | |||
===== 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 determine which component is causing problems. | |||
<syntaxhighlight lang="nix"> | |||
services.udev.extraRules = '' | |||
ACTION=="add", SUBSYSTEM=="pci", DRIVER=="pcieport", ATTR{power/wakeup}="disabled" | |||
''; | |||
</syntaxhighlight> | |||
===== Solution 2: Disable a common NVMe interface ===== | |||
Specifically on Gigabyte motherboards you can try targetting only the NVMe ports. | |||
<syntaxhighlight lang="nix"> | |||
services.udev.extraRules = '' | |||
ACTION=="add" SUBSYSTEM=="pci" ATTR{vendor}=="0x1022" ATTR{device}=="0x1483" ATTR{power/wakeup}="disabled" | |||
''; | |||
</syntaxhighlight> | |||
===== 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 find out which component is causing the wakeup events. | |||
First, list all components and their current wakeup status: | |||
<syntaxhighlight lang="sh"> | |||
$ cat /proc/acpi/wakeup | |||
Device S-state Status Sysfs node | |||
GP12 S4 *enabled pci:0000:00:07.1 | |||
GP13 S4 *disabled pci:0000:00:08.1 | |||
XHC0 S4 *enabled pci:0000:0a:00.3 | |||
GP30 S4 *disabled | |||
.... | |||
PT27 S4 *disabled | |||
PT28 S4 *disabled | |||
PT29 S4 *disabled pci:0000:03:09.0 | |||
</syntaxhighlight> | |||
You can temporarily toggle a device by writing its "Device" name back into <code>/proc/acpi/wakeup</code> | |||
<syntaxhighlight lang="sh"> | |||
echo GPP0 | sudo tee /proc/acpi/wakeup | |||
</syntaxhighlight> | |||
After finding out which component is causing unwanted wakeups you can use the sysfs id to find out the "vendor" and "device" fields: | |||
<syntaxhighlight lang="sh"> | |||
$ cat /sys/class/pci_bus/0000:04/device/0000:04:00.0/vendor | |||
0x1987 | |||
$ cat /sys/class/pci_bus/0000:04/device/0000:04:00.0/device | |||
0x5013 | |||
</syntaxhighlight> | |||
And finally use those values in a <code>udev</code> rule: | |||
<syntaxhighlight lang="nix"> | |||
services.udev.extraRules = '' | |||
ACTION=="add" SUBSYSTEM=="pci" ATTR{vendor}=="0x1987" ATTR{device}=="0x5013" ATTR{power/wakeup}="disabled" | |||
''; | |||
</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}} | ||