Question: How to set a persistant resolution?

[PWM-Master]

I am able to set the desired resolution with wlr-randr after Cage is started.
I understand, that changing the resolution is not possible before Cage is started.
To provide some form of resolution persistance: what could be a method to call wlr-randr while starting Cage?
I experimented with some old-school X11 start configurations, like ~/.xinitrc, but none worked.

In the Cage wiki/issues there was only a daemon named kanshi mentioned on a related topic.
Is there any additional start configuration or xinit-comparable script-hook for cage/wayland?

[emersion]

Ideally Cage would support a mode where it completely delegates output configuration to kanshi, instead of making decisions on its own.

[PWM-Master]

So there are no startup -options or -scripts that can be used now - and kanshi is the way to go for setting a resolution. Thanks for the info/clarification.

[emersion]

You can use wlr-randr instead of kanshi if you don't need hotplug. However cage will still perform its own modeset before wlr-randr has the chance to change it to something else.

[embdur]

What I ended up doing was calling wlr-randr before starting my (Java) app. Here is the ExecStart line from my systemd service file:

ExecStart=/usr/bin/cage -- sh -c 'wlr-randr --output HDMI-A-2 --mode 1920x1080@60 && java -jar /home/cage/PiKiosk-linux-arm64-1.0.0.jar'

More on this here: https://github.com/SergeySn/PiKiosk/?tab=readme-ov-file#run-the-sample-compose-app-with-cage -> 8. Optional: Force cage to use a specific resolution