Question: how do I get notified when display setup is complete?

[JetA2]

Hi, and thanks for the work on the wlroots bindings.

I have a 1024x768 display I want to use with Linux which seems to behave in a non-standard way.
The only way I can get the display to work properly is using a wlroots-based compositor.
It seems the DRM atomic commit operation is what's doing the trick.

X does not work with my display. However, once I've run and exited sway for example, the display is setup correctly and X applications work.

To initialise my display I'm writing a wlroots utility that should only do an output commit and then exit.
This is working, but I'm not able to exit the display event loop using `display.terminate()´.

If I call it from the backend's new_output_event callback, I guess it's too early since the event loop is not yet started.

Is there an event from the display I can listen for that I can use to terminate the display?

This is the current source that sets up the display fine, but of course does not exit:

from pywayland.server import Display, Listener
from wlroots.backend import Backend, BackendType
from wlroots.wlr_types import Output, OutputState
from wlroots.renderer import Renderer
from wlroots.allocator import Allocator

def server_new_output(listener, output: Output) -> None:
	print("New output")

	global allocator, renderer
	
	output.init_render(allocator, renderer)

	state = OutputState()
	state.set_enabled(True)
	if mode := output.preferred_mode():
		state.set_mode(mode)

	output.commit(state)
	state.finish()

print("Starting")

display = Display()

backend = Backend(display, backend_type=BackendType.AUTO)
backend.new_output_event.add(Listener(server_new_output))

renderer = Renderer.autocreate(backend)

allocator = Allocator.autocreate(backend, renderer)

backend.start()

display.run()

print("Bye!")

[JetA2]

This seems to do what I want:

def idle(display) -> None:
        display.terminate()

event_loop = display.get_event_loop()
event_loop.add_idle(idle,display)

However, I'm getting a segmentation fault on exit during garbage collection.
Did I miss creating any required objects?

Fatal Python error: Segmentation fault

Current thread 0x00007e8c846aeb80 (most recent call first):
  Garbage-collecting
  <no Python frame>

[heuer]

Maybe this helps?

import signal

from pywayland.server import Display, Listener
from wlroots.backend import Backend
from wlroots.wlr_types import Output, OutputState
from wlroots.renderer import Renderer
from wlroots.allocator import Allocator


def server_new_output(_, output: Output) -> None:
    print("New output")

    global allocator, renderer
	
    output.init_render(allocator, renderer)

    state = OutputState()
    state.set_enabled(True)
    if mode := output.preferred_mode():
        state.set_mode(mode)
    output.commit()
    state.finish()

    signal.raise_signal(signal.SIGTERM)


print("Starting")

display = Display()


backend = Backend(display)
backend.new_output_event.add(Listener(server_new_output))

renderer = Renderer.autocreate(backend)

allocator = Allocator.autocreate(backend, renderer)

backend.new_output_event.add(Listener(server_new_output))

backend.start()
display.run()