Lockscreen on suspend (LightDM)

Currently I'm using LightDM with the lightdm-webkit2-greeter and multiple WM/DM's.

I3, AwesomeWM, Gnome and KDE

My problem is that on auto suspend or closing my laptop lid the screen either wont lock when using gnome, or that I will get a different lock screen which I'm unable to identify.

I know that LightDM has some problems with locking your screen on suspend but there has to be a way? My first question is, what kind of Lock screen Am I looking at?

The Lockscreen in question

Sorry for the phone picture, I was unable to make a screenshot

The second one would be, how can I make LightDM lock my screen on suspend or closing my laptop?

I already tried to create a service with systemd but that doesn't work for me, here is the script anyways:

Actually I tried 3 different ones I found on the web, but none of them works.

First one

[Unit]
Description=Lock screen when waking up

[Service]
User=%I
Type=forking
Environment=DISPLAY=:0
ExecStart=/usr/bin/dm-tool lock

[Install]
WantedBy=sleep.target suspend.target hibernate.target hybrid-sleep.target suspend-then-hibernate.target

Second

[Unit]
Description=Turning i3lock on before sleep
Before=sleep.target

[Service]
User=%I
Type=forking
Environment=DISPLAY=:0
ExecStart=/usr/bin/dm-tool lock
ExecStartPost=/usr/bin/sleep 1

[Install]
WantedBy=sleep.target

And the third one

[Unit]
Description=Turning light-locker on before sleep
Before=sleep.target

[Service]
User=%I
Type=forking
Enviroment=XDG_SEAT_PATH="/org/freedesktop/DisplayManager/Seat0"
ExecSart=/usr/bin/dm-tool lock
ExecStartPost=/usr/bin/sleep 1

[Install]
WantedBy=sleep.target

I'm sorry if I'm missing something trivial, but i never worked with services before And just to clear it up, yes I enabled and started them with systemd

sudo systemctl enable xyz.service

I might need to mention that I use a program called howdy to unlock my laptop with my face, I had the problem before, but I'm unsure if it might affect a solution in any way.

Locking the screen manual with dm-tool or light-locker works.

I got the last one to start with changing Environment and ExecStart. I also don't know what the User=%I does, but you should check it out with systemctl status file.service.

[Unit]
Description=Turning light-locker on before sleep
Before=sleep.target

[Service]
Type=forking
Environment=XDG_SEAT_PATH="/org/freedesktop/DisplayManager/Seat0"
ExecStart=/usr/bin/dm-tool lock
ExecStartPost=/usr/bin/sleep 1

[Install]
WantedBy=sleep.target

As for the oddball lock screen, see if you can catch a snapshot of what's running using ps - either temporarily in the service or using Ctrl-Alt-F2/F7.