The result of the display setting script is not reflected

[Hayao0819]

What Happened

I am setting the display layout with xrandr with display-setup-script in lightdm.coonf.
This works fine with Slick-Greeter and Webki2-Greeter.
However, it does not work properly with Pantheon-Greeter.
The script appears to be running, but the display settings are incorrect.
I tried some tricks such as adding a delay and setting it as a greeter-setup-script, but the result did not change.

Expected Behavior

It should be set up just like any other Greeter.

Logs

Platform Information

Arch Linux (no testing repo)
lightdm-pantheon-greeter 5.0.4-2
lightdm 1:1.30.0-4

[tintou]

Duplicate of #404 see the comments for the workaround.

[Hayao0819]

I have already read that issue
But 404 is a configuration file by Xorg.
In my case it is a command by xrandr.
And I'm using Xfce and don't want to use Gnome's settings.

[tintou]

They are really the same configuration mechanism which isn't supported by libmutter (in use in the greeter).

[Hayao0819]

I understood