csd-power does not hold handle-lid-switch inhibitor, so logind suspends on lid close despite "Do nothing" setting

Open

#475 opened on Sep 30, 2026 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 55/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Active
Tech stack: c, linux
Domain: desktop, operating-systems

Research direction

Start with csd-power and reproduce the lid-close behavior using the Power Management settings and systemd-inhibit --list. Trace why the handle-lid-switch inhibitor is absent or lost after resume or monitor changes; done means the configured “Do nothing” action is enforced and the inhibitor remains present in the reported scenario.

Written by the indexing model from the issue text.

Description

Summary

In Power Management, "When the lid is closed" is set to Do nothing for both battery and AC, but the laptop still suspends on most lid closes. csd-power is running and inhibit-lid-switch is true, yet no handle-lid-switch inhibitor is registered with systemd-logind. As a result logind falls back to its own default (HandleLidSwitch=suspend) and suspends the machine. The UI gives no indication that the chosen setting is not in effect.

Environment

Distro: Ubuntu 24.04.5 LTS, X11 session
cinnamon 6.0.4-4, cinnamon-settings-daemon 6.0.0-1build4
systemd 255.4-1ubuntu8.17
Kernel 7.0.0-31-generic
Hardware: Dell Latitude 5330
No custom logind.conf (stock defaults)

Settings

$ gsettings list-recursively org.cinnamon.settings-daemon.plugins.power | grep -i lid
org.cinnamon.settings-daemon.plugins.power inhibit-lid-switch true
org.cinnamon.settings-daemon.plugins.power lid-close-ac-action 'nothing'
org.cinnamon.settings-daemon.plugins.power lid-close-battery-action 'nothing'
org.cinnamon.settings-daemon.plugins.power lid-close-suspend-with-external-monitor false

logind effective values:

HandleLidSwitch=suspend
HandleLidSwitchExternalPower=(unset, falls back to HandleLidSwitch)
HandleLidSwitchDocked=ignore

Inhibitors (csd-power running, PID 2959)

$ systemd-inhibit --list
WHO             UID  USER  PID   COMM            WHAT                                                     WHY                                   MODE
ModemManager    0    root  1446  ModemManager    sleep                                                    ModemManager needs to reset devices   delay
NetworkManager  0    root  1334  NetworkManager  sleep                                                    NetworkManager needs to turn off ...  delay
UPower          0    root  1802  upowerd         sleep                                                    Pause device polling                  delay
...             0    root  1942  unattended-upgr shutdown                                                 ...                                   delay
<user>          1001 <user> 2977 csd-media-keys  handle-power-key:handle-suspend-key:handle-hibernate-key Cinnamon handling keypresses          block
<user>          1001 <user> 2959 csd-power       sleep                                                    Cinnamon needs to lock the screen     delay
slack           1001 <user> ...  slack           sleep                                                    Application cleanup before suspend    delay

There is no handle-lid-switch block inhibitor from csd-power, even though inhibit-lid-switch is true.

Logs

logind suspends immediately on lid close. The only lid closes that don't cause a suspend are docked closes (external monitor) or closes within logind's ~30s post-resume holdoff. That is why the behavior looks intermittent.

Sep 29 08:02:45 systemd-logind[1290]: Lid closed.
Sep 29 08:02:45 systemd-logind[1290]: Suspending...
Sep 29 18:15:31 systemd-logind[1290]: Lid closed.
Sep 29 18:15:31 systemd-logind[1290]: Suspending...
Sep 30 08:12:43 systemd-logind[1290]: Lid closed.
Sep 30 08:12:43 systemd-logind[1290]: Suspending...
Sep 30 08:12:53 systemd-logind[1290]: Lid opened.
Sep 30 08:13:03 systemd-logind[1290]: Lid closed.        <- 10s after resume, within holdoff: no suspend
Sep 30 08:13:21 systemd-logind[1290]: Lid opened.
Sep 30 08:27:35 systemd-logind[1290]: Lid closed.
Sep 30 08:27:35 systemd-logind[1290]: Suspending...

Steps to reproduce

In System Settings → Power Management, set "When the lid is closed" to "Do nothing" for battery and AC.
With no external monitor attached, close the lid (more than 30s after boot or resume).
The system suspends.
Check with systemd-inhibit --list: no handle-lid-switch inhibitor is present.

Expected

When inhibit-lid-switch is true, csd-power holds a handle-lid-switch block inhibitor and applies the configured lid action itself, so "Do nothing" does nothing.

Actual

The inhibitor is missing, logind handles the lid with its own default, and the laptop suspends. The Power Management UI shows "Do nothing" with no warning that the setting isn't in effect.

Suggestions

Find out why the inhibitor isn't taken, or is dropped, in this session (for example, after a resume or a monitor hotplug).
Have the Power Management panel warn when the lid action can't be enforced, e.g. if csd-power has no lid inhibitor while logind's HandleLidSwitch differs from the chosen action.

Workaround

Set HandleLidSwitch=ignore (and HandleLidSwitchExternalPower=ignore) in /etc/systemd/logind.conf.d/*.conf and reboot.

Dominant language: C
Stars: 70
Forks: 78
PR merge metrics: No merged PRs in 30d

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First steps

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More C issues

csd-power does not hold handle-lid-switch inhibitor, so logind suspends on lid close despite "Do nothing" setting

Is something wrong?

Assessment

Research direction

Description

Summary

Environment

Settings

Inhibitors (csd-power running, PID 2959)

Logs

Steps to reproduce

Expected

Actual

Suggestions

Workaround

Getting set up

First steps

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