[ISSUE] lxqt-powermanagement doesn't dim the screen when idle timer is supposed to run out

[ISSUE] lxqt-powermanagement doesn't dim the screen when idle timer is supposed to run out

[GaetanDC]

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New issue by GaetanDC on void-packages repository

https://github.com/void-linux/void-packages/issues/53110

Description:
### Is this a new report?

Yes

### System Info

Linux gadell 6.11.7-300.fc41.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Nov  8 19:23:10 UTC 2024 x86_64 GNU/Linux

### Package(s) Affected

lxqt-powermanagement-2.0.0-1.fc41.x86_64

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

_No response_

### Expected behaviour

After idle time, the system is expected to suspend.

### Actual behaviour

After idle time (and also lot more), the system doesn't suspend ...

Starting from commandline:

$ lxqt-powermanagement
kf.idletime: Could not find any system poller plugin
qt.core.qobject.connect: QObject::connect(KAbstractIdleTimePoller, KIdleTime): invalid nullptr parameter
qt.core.qobject.connect: QObject::connect(KAbstractIdleTimePoller, KIdleTime): invalid nullptr parameter


### Steps to reproduce

1. stop the usual daemon (started by system) doing 
$ killall lxqt-powermanager


2. Start the tool
$ lxqt-powermanagement

3. wait for idle-time (in my case: 1 minute), and see it doesn't suspend.