pm-suspend does not lock screen

[^rooker]

System: Xubuntu 20.04.3 (64bit)

When suspending my notebook by calling "/usr/sbin/pm-suspend", there is **no login dialog** after resuming. If I suspend using the graphical XFCE logout menu, the screen is locked properly.

I've checked on my other 18.04 machine: There, pm-suspend locks the screen as expected.

Is this something to be configured or a parameter?
Grateful for any hints :)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pm-utils 1.4.1-19
ProcVersionSignature: Ubuntu 5.4.0-77.86-generic 5.4.119
Uname: Linux 5.4.0-77-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Fri Oct 15 19:39:23 2021
InstallationDate: Installed on 2021-01-16 (271 days ago)
InstallationMedia: Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
PackageArchitecture: all
SourcePackage: pm-utils
UpgradeStatus: No upgrade log present (probably fresh install)

[^rooker (rooker)]

Oh!
On the 18.04 machine I actually executed:
`xfce4-session-logout --suspend`

Now realizing this, I'm asking myself if this issue should be closed since "pm-suspend" isn't supposed to lock, because that's "xflock4" job, right? :|

Sorry for the noise.
Yet, I hope it may at least point others towards "xfce4-session-logout" when suspending by command :D