Score:2

Ubuntu

Force suspend when closing lid

n0tis

11/16/23, 3:40 PM

Some oppened apps (such as teamviewer or chrome when on an teleconference website) seems to prevent my laptop from going to sleep when I close the lid.

How to force laptop to go to sleep(=suspend) when I close the lid ?

ENV: ubuntu 20.04 on a thinkpad t14s

115

1 + 2

suspend

MDeBusk

11/16/23, 6:18 PM

This is an interesting problem. What would motivate you to want your laptop to suspend in the middle of a teleconference?

n0tis

11/16/23, 6:25 PM

No matter whatever softwares is running, when I close my lid and throw my laptop in my backpack, I want it suspended not to get hot. Closing all my. apps beforehand is tedious.

Score:1

Ubuntu

kanehekili

11/23/23, 10:25 AM

systemd-inhibit --list --mode=block

will list you all the apps that will prevent suspend/hibernation.

The only way to "force" a suspend will be to write a script that will "kill" these apps.

In xfce that would include the xfce4-power-manager who is responsible for checking if someone inhibits - so there should be exceptions from the rule.

The answer of the call above will provide you with the app name and its pid. If killing an app this way is a good idea was not asked by the OP.

You'd have to connect that script to the "lidClose" acpi call or create a systemd service that will be executed before suspend:

[Unit]
Before=suspend.target
[Service]
Type=simple
StandardOutput=syslog
ExecStart= yourScriptHere
[Install]
WantedBy=suspend.target

+ 6

n0tis

11/23/23, 6:20 PM

Thanks, but does not work: google-chrome, when in my visioconfernece website (https://kmeet.infomaniak.com/) is blocking susped but does not show up in `systemd-inhibit --list --mode=block`

n0tis

11/27/23, 10:21 AM

Edit: actually a new line DOES appear in this command output, but it's PID is not as expected, it's the one from "gnome-session-binary", killing it results in a chrome crash :/

kanehekili

11/27/23, 6:52 PM

what about `killall "google-chrome"` ? It'll sandbox your apps, so you won't see them process wise

n0tis

11/29/23, 10:11 AM

1. I don't want to kill chrome if it's not runnig any sleep blocking 2. "systemd-inhibit --list --mode=block" dives out a generic gnome PID with no way to know it's due to chrome. 3. this program seems to be able to list chrome blocking by it's appID https://pypi.org/project/list-session-inhibitors/ 4. now I just have to find a way to kill an app knowing only it's app ID, which is probably doable, will try when I have time.

kanehekili

11/29/23, 10:42 AM

Report back. I'd be interested in your solution

kanehekili

11/30/23, 12:26 AM

Correct. This will certainly work. But I didn't recommend it, because this bypasses any "driver cleanups" systemd/pm-suspend will do. Try this with a NVIDIA card and it won't come back on resume

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Force suspend when closing lid

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