Time suspended not recognized as idle time

[jjramsey]

Describe the bug
Workrave does not seem to recognize that when my desktop is suspended (i.e., I click "Suspend" in the GNOME menu and leave the machine alone). When I wake up from suspension, the rest break window appears, and the status indicator of Workrave indicates that my rest break is overdue by roughly however long I've been suspended (minus the length of the rest break?).

To Reproduce
Steps to reproduce the behavior:

1. Go to the upper right corner of the GNOME desktop and left-click.
2. Click on the button with the "Power" icon. This will open a menu entitled "Power Off".
3. Click on the "Suspend" item.
4. Walk away for a few hours.
5. Wake up the computer

Expected behavior
Workrave should recognize that the computer has been idle and not prompt for a rest break.

Screenshots
This is what I saw after the last time my desktop woke up from suspension:

Linux

• Distribution: Arch
• Distribution Version: rolling
• Desktop Environment: GNOME 46
• Workrave Version: 1.11.0-beta.12

Additional context
I'm running on Wayland, and the "Force the use of X11 on Wayland" is unchecked. I installed Workrave via the AUR (https://aur.archlinux.org/packages/workrave-git) but modified the PKGBUILD file so that Workrave is built with the -DWITH_GNOME45=ON and -DHAVE_WAYLAND:BOOL=TRUE CMake flags.

[jjramsey]

I still see the same problem after switching to KDE 6 on Wayland. The only difference is that instead if clicking the "Suspend" menu item in GNOME shell, I click the "Sleep" button in KDE's Application Menu.

Looks like the symptoms are similar to the ones for this bug found on Windows here: #540

[patch-work]

I confirm the problem on Fedora Linux 40, self-compiled workrave with default configuration.
##543