Power Management: Difference between revisions

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Line 30:

systemd.services.your-service-name = {

description = "Service description here";

wantedBy = [ "post-resume.target" ];

after = [ "post-resume.target" ];

script = ''

echo "This should show up in the journal after resuming."

'';

serviceConfig.Type = "oneshot";

};

</syntaxhighlight>

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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 = [

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Line 57:

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/zram0 partition 32881148 032767

/dev/zram0 partition 32881148 032767</syntaxhighlight>

</syntaxhighlight>

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

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Line 198:

</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 ====

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

@@ Line 30: / Line 30: @@
 <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."
-    '';
+  '';
-    serviceConfig.Type = "oneshot";
+  serviceConfig.Type = "oneshot";
-  };
+};
 </syntaxhighlight>
@@ Line 48: / Line 48: @@
 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 = [
@@ Line 59: / Line 57: @@
 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/zram0                              partition       32881148       032767
+/dev/zram0                              partition       32881148       032767</syntaxhighlight>
-</syntaxhighlight>
 Test and use hibernation with the following command:<syntaxhighlight lang="nix">
@@ Line 203: / Line 198: @@
 </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 ====
 An existing suspend operation that is hung may be interrupted using <code>'''systemctl cancel'''</code> in case reboots or internet access is needed.