Power Management - Revision history

DHCP: style fixes

2026-07-16T07:55:20Z

style fixes

← Older revision		Revision as of 07:55, 16 July 2026
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	Therefore, an example configuration could look like this:<syntaxhighlight lang="nix">		Therefore, an example configuration could look like this:<syntaxhighlight lang="nix">
	// I'm hibernating into a logical volume that's also under LUKS. Pretty cool, right?		# I'm hibernating into a logical volume that's also under LUKS. Pretty cool, right?

	swapDevices = [		swapDevices = [
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	/dev/zram0 partition 32881148 032767</syntaxhighlight>		/dev/zram0 partition 32881148 032767</syntaxhighlight>

	Test and use hibernation with the following command:<syntaxhighlight lang="~~nix~~">		Test and use hibernation with the following command:<syntaxhighlight lang="console">
	systemctl hibernate		$ systemctl hibernate
	</syntaxhighlight>		</syntaxhighlight>

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	You can temporarily toggle a device by writing its "Device" name back into <code>/proc/acpi/wakeup</code>		You can temporarily toggle a device by writing its "Device" name back into <code>/proc/acpi/wakeup</code>

	<syntaxhighlight lang="sh">		<syntaxhighlight lang="console">
	echo GPP0 \| sudo tee /proc/acpi/wakeup		$ echo GPP0 \| sudo tee /proc/acpi/wakeup
	</syntaxhighlight>		</syntaxhighlight>

SrGesus: Replace deprecated sleep extraConfig option that was missed last edit

2026-05-31T15:37:34Z

Replace deprecated sleep extraConfig option that was missed last edit

← Older revision		Revision as of 15:37, 31 May 2026
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	=== Hibernate after specified time ===		=== Hibernate after specified time ===
	Using following configuration, your system will go from suspend into hibernate after 1 hour:<syntaxhighlight lang="nix">		Using following configuration, your system will go from suspend into hibernate after 1 hour:<syntaxhighlight lang="nix">
	systemd.sleep.~~extraConfig~~ = ''		systemd.sleep.settings.Sleep = {
	HibernateDelaySec=1h		HibernateDelaySec = "1h";
	'';		};
	</syntaxhighlight>		</syntaxhighlight>

Nipsy: Update section formatting and replace deprecated sleep option

2026-05-22T19:39:05Z

Update section formatting and replace deprecated sleep option

← Older revision		Revision as of 19:39, 22 May 2026
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	== Tips and tricks ==		== Tips and tricks ==

	=== ~~Go into hibernate~~ after ~~specific suspend~~ time ===		=== Hibernate after specified time ===
	Using following configuration, your system will go from suspend into hibernate after 1 hour:<syntaxhighlight lang="nix">		Using following configuration, your system will go from suspend into hibernate after 1 hour:<syntaxhighlight lang="nix">
	systemd.sleep.extraConfig = ''		systemd.sleep.extraConfig = ''
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	</syntaxhighlight>		</syntaxhighlight>

	Or, to ~~disable suspend entirely, consider a configuration like this~~:		=== Disable all sleep functionality ===

			Some desktop environment and display manager combinations might attempt to put your machine to sleep as default behavior (i.e. SDDM and KDE Plasma 6 under Wayland). If this is not what you want, you can define the following to block any service attempting to put your machine to sleep via systemd:

	<syntaxhighlight lang="nix">		<syntaxhighlight lang="nix">
	systemd.sleep.~~extraConfig~~ = ''		systemd.sleep.settings.Sleep = {
	~~AllowSuspend~~=no		AllowHibernation = "no";
	~~AllowHibernation~~=no		AllowHybridSleep = "no";
	~~AllowHybridSleep~~=no		AllowSuspend = "no";
	AllowSuspendThenHibernate=no		AllowSuspendThenHibernate = "no";
	'';		};
	</syntaxhighlight>		</syntaxhighlight>

Sandro: /* Hibernation */

2026-01-18T10:00:18Z

Hibernation

← Older revision		Revision as of 10:00, 18 January 2026
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	Therefore, an example configuration could look like this:<syntaxhighlight lang="nix">		Therefore, an example configuration could look like this:<syntaxhighlight lang="nix">
	/*		// I'm hibernating into a logical volume that's also under LUKS. Pretty cool, right?
	I'm hibernating into a logical volume that's also under LUKS. Pretty cool, right?
	*/

	swapDevices = [		swapDevices = [

Sandro: /* Suspend hooks */

2026-01-18T10:00:01Z

Suspend hooks

← Older revision		Revision as of 10:00, 18 January 2026
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	<syntaxhighlight lang="nix">		<syntaxhighlight lang="nix">
	systemd.services.your-service-name = {		systemd.services.your-service-name = {
	description = "Service description here";		description = "Service description here";
	wantedBy = [ "post-resume.target" ];		wantedBy = [ "post-resume.target" ];
	after = [ "post-resume.target" ];		after = [ "post-resume.target" ];
	script = ''		script = ''
	echo "This should show up in the journal after resuming."		echo "This should show up in the journal after resuming."
	'';		'';
	serviceConfig.Type = "oneshot";		serviceConfig.Type = "oneshot";
	};		};
	</syntaxhighlight>		</syntaxhighlight>

LordXerus: Clarified that solutions may vary when troubleshooting a blocked pre-sleep.service

2026-01-16T23:06:03Z

Clarified that solutions may vary when troubleshooting a blocked pre-sleep.service

← Older revision		Revision as of 23:06, 16 January 2026
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	</syntaxhighlight>		</syntaxhighlight>

	~~The~~ <code>pre-sleep-start</code> script referenced by <code>ExecStart</code> contained directives installed by the [[Displaylink]] package, that contained a flush operation which hung the suspend action. Starting <code>dlm.service</code> or running <code>sudo DisplayLinkManager</code> unblocks the script and made suspend work normally.		In this case, the <code>pre-sleep-start</code> script referenced by <code>ExecStart</code> contained directives installed by the [[Displaylink]] package, that contained a flush operation which hung the suspend action. Starting <code>dlm.service</code> or running <code>sudo DisplayLinkManager</code> unblocks the script and made suspend work normally.

	==== Cancelling an existing suspend action ====		==== Cancelling an existing suspend action ====

LordXerus: Added a header to highlight systemctl cancel

2026-01-16T22:53:58Z

Added a header to highlight systemctl cancel

← Older revision		Revision as of 22:53, 16 January 2026
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	The <code>pre-sleep-start</code> script referenced by <code>ExecStart</code> contained directives installed by the [[Displaylink]] package, that contained a flush operation which hung the suspend action. Starting <code>dlm.service</code> or running <code>sudo DisplayLinkManager</code> unblocks the script and made suspend work normally.		The <code>pre-sleep-start</code> script referenced by <code>ExecStart</code> contained directives installed by the [[Displaylink]] package, that contained a flush operation which hung the suspend action. Starting <code>dlm.service</code> or running <code>sudo DisplayLinkManager</code> unblocks the script and made suspend work normally.

			==== Cancelling an existing suspend action ====
	An existing suspend operation that is hung may be interrupted using <code>'''systemctl cancel'''</code> in case reboots or internet access is needed.		An existing suspend operation that is hung may be interrupted using <code>'''systemctl cancel'''</code> in case reboots or internet access is needed.

LordXerus: Added a lang="text" to syntaxhighlight

2026-01-16T22:51:55Z

Added a lang="text" to syntaxhighlight

← Older revision		Revision as of 22:51, 16 January 2026
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	boot.resumeDevice = "/dev/dm-7";		boot.resumeDevice = "/dev/dm-7";
	</syntaxhighlight>Derived from a system with the following output from <code>swapon -s</code> :<syntaxhighlight>		</syntaxhighlight>Derived from a system with the following output from <code>swapon -s</code> :<syntaxhighlight lang="text">Filename Type Size Used Priority
	Filename Type Size Used Priority
	/dev/dm-7 partition 67108860 00		/dev/dm-7 partition 67108860 00
	/dev/zram0 partition 32881148 032767		/dev/zram0 partition 32881148 032767</syntaxhighlight>

	</syntaxhighlight>

	Test and use hibernation with the following command:<syntaxhighlight lang="nix">		Test and use hibernation with the following command:<syntaxhighlight lang="nix">

LordXerus: change lang=sh to shell session to fix syntax highlighting error

2026-01-16T22:50:01Z

change lang=sh to shell session to fix syntax highlighting error

← Older revision		Revision as of 22:50, 16 January 2026
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	After finding out which component is causing unwanted wakeups you can use the sysfs id to find out the "vendor" and "device" fields:		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">		<syntaxhighlight lang="console">
	$ cat /sys/class/pci_bus/0000:04/device/0000:04:00.0/vendor		$ cat /sys/class/pci_bus/0000:04/device/0000:04:00.0/vendor
	0x1987		0x1987

LordXerus: Added a section to troubleshoot userspace suspend issues.

2026-01-16T22:48:45Z

Added a section to troubleshoot userspace suspend issues.

@@ Line 155: / Line 155: @@
 '';
 </syntaxhighlight>
 == See also ==