Unix version demo code displays a blank window.

[gmeader]

Describe the bug
I successfully built lvgl_micropy_unix on a freshly installed Lubuntu 24.10 machine,
python3 make.py unix DISPLAY=sdl_display INDEV=sdl_pointer

I copied the Python code example for Unix/macOS into a file named demo.py

Running ./lvgl_micropy_unix demo.py displays a window for an instant, then it disappears.
Adding a time.sleep(15) at the end of the demo code keeps the window displayed for 15 sec.
However the window is empty with black background, It has a title bar labelled "LVGL MP".
Changing the bg color hex value in lv.color_hex() does not change the background color of the window.

Expected behavior
Expected to see a window with a slider displayed in it.

I need to know the OS and OS version of the machine that compiled the binary. If using a VM then I need to know the OS and OS version the VM is running. (WSL == VM)

• OS: Lubuntu 24.10

Build Command

python3 make.py unix DISPLAY=sdl_display INDEV=sdl_pointer

[kdschlosser]

when you run a python script from the command line the script ends and so does the MicroPython session with it.... don't run it from the command line. Instead run just the binary and import the module and you will see it runs fine.

If you really wanted to keep the script running from the command line is you would need to add the following code to the end of the script.

import time

while True:
    time.sleep_ms(1)
    lcd_bus._pump_main_thread()

[gmeader]

SUCCESS Thanks!
I run .lvgl_micropy_unix
I get the expected REPL prompt.
I enter: import demo.py
(the Python code example for Unix/macOS from the README)

A window appears with a working slider!

(I do get an error message: ImportError: no module named 'demo.py')
Edit: give the command import demo, instead of import demo.py to avoid the ImportError message.

[kdschlosser]

so it's working as it should?

[kdschlosser]

You need to have the script in the same folder where the binary is located in order to import it.

[gmeader]

it is working as it should.
The demo.py script is in the same folder as the binary lvgl_micropy_unix (/build) and that is my current working directory.
The demo.py code runs properly when give the import demo.py command, but an ImportError message also appears in the REPL. The solution is to leave off the .py extension like this: import demo

[kdschlosser]

OYE!.. Yeah you do not need the .py on the end. If I said to do that forgive me. I was brain dead when I typed it apparently.