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fragos.george

Member

From: Volos, Greece

Registered: 2017-02-02

Posts: 5

[SOLVED]Identify laptop's power control mechanism

Hello!
How do I know what mechanism controls laptop's lid power behavior...?
systemctl status acpid.service outputs

acpid.service - ACPI event daemon
   Loaded: loaded (/usr/lib/systemd/system/acpid.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:acpid(8)

Whereas "cat /proc/sys/vm/laptop_mode" yields

""0""

Thanx!

Last edited by fragos.george (2017-08-13 15:29:14)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,877

Re: [SOLVED]Identify laptop's power control mechanism

In doubt systemd - see /etc/systemd/logind.conf

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fragos.george

Member

From: Volos, Greece

Registered: 2017-02-02

Posts: 5

Re: [SOLVED]Identify laptop's power control mechanism

In doubt systemd - see /etc/systemd/logind.conf

Thanx for reply!

cat /etc/systemd/logind.conf says:

#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See logind.conf(5) for details.

[Login]
#NAutoVTs=6
#ReserveVT=6
#KillUserProcesses=no
#KillOnlyUsers=
#KillExcludeUsers=root
#InhibitDelayMaxSec=5
#HandlePowerKey=poweroff
#HandleSuspendKey=suspend
#HandleHibernateKey=hibernate
#HandleLidSwitch=suspend
#HandleLidSwitchDocked=ignore
#PowerKeyIgnoreInhibited=no
#SuspendKeyIgnoreInhibited=no
#HibernateKeyIgnoreInhibited=no
#LidSwitchIgnoreInhibited=yes
#HoldoffTimeoutSec=30s
#IdleAction=ignore
#IdleActionSec=30min
#RuntimeDirectorySize=10%
#RemoveIPC=yes
#InhibitorsMax=8192
#SessionsMax=8192
#UserTasksMax=33%

All entries are commented! I did not do that! Is this normal...?
Laptop's behavior is not always the same when I close its lid... Sometimes it goes to suspend but sometimes it turns off completely! I'll check what will happen if I un-comment HandleLidSwitch=suspend
Thank you again!

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,877

Re: [SOLVED]Identify laptop's power control mechanism

It's notmal and nothing is gonna happen - you probably want to set it to "ignore"?

On a sidenote, please wrap file contents and command outputs into code tags.

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fragos.george

Member

From: Volos, Greece

Registered: 2017-02-02

Posts: 5

Re: [SOLVED]Identify laptop's power control mechanism

Hey, seth! Thanx for replying!
I don't want it set "ignore": I need it go to suspend when I close the lid... So, maybe "suspend" is the right option?

One more thing and forgive my ignorance and my........you know, asking and asking and asking...!
Nothing so far tells me anything about the mechanism of power control. I mean, is it ACPID, laptop_mode thing or what...!

(Summer time is not right for such endeavors... No air conditioning is sufficient here!)

Last edited by fragos.george (2017-08-13 15:18:42)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,877

Re: [SOLVED]Identify laptop's power control mechanism

Suspend is the default - so your problem is that the lidswitch has no impact at all?
=> Maybe start by describing the status quo and what you want to gain.

There's no single instance handing "power management" - it happens across the entire stack from the hardware, over the kernel, into the userspace where various daemons may call random routines.

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Lone_Wolf

Administrator

From: Netherlands, Europe

Registered: 2005-10-04

Posts: 15,562

Re: [SOLVED]Identify laptop's power control mechanism

#HandleLidSwitch=suspend

That tells systemd-logind it MUST handle lidswitches and suspend the system when it detects one.

If you change it to ignore, systemd-logind will do nothing on lidswitch, thus giving other handlers (like your acpid.service ) a chance to act .

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fragos.george

Member

From: Volos, Greece

Registered: 2017-02-02

Posts: 5

Re: [SOLVED]Identify laptop's power control mechanism

Alright, people, I uncommented #HandleLidSwitch=suspend and see how it'll go...
Thanx for your help!