Nothing is displayed with JDK17 and Monocle headless mode for RPi@aarch64

[eximius313]

1. I've followed guidelines from the docs
2. I've used 64 bit version or RaspiOS
3. I've set "Boot to CLI" using raspi-config:

System Options -> Boot / Auto Login -> B1 Console

4. I've set 512 MB for GPU Memory using raspi-config:

Performance Options -> GPU Memory -> 512

5. I've installed JDK 17 using SDKMAN:

sdk install java 17.0.2-tem

pi@raspberrypi:~ $ java -version
openjdk version "17.0.2" 2022-01-18
OpenJDK Runtime Environment Temurin-17.0.2+8 (build 17.0.2+8)
OpenJDK 64-Bit Server VM Temurin-17.0.2+8 (build 17.0.2+8, mixed mode, sharing)

6. Because I want to use JavaFX in headless mode, I've downloaded Monocle SDK (and not regular one)
7. Ive installed required libraries:

"sudo apt install libegl-mesa0 libegl1 libgbm1 libgles2 libpango-1.0-0 libpangoft2-1.0-0"

(you have a typo in documentation by the way - it should be libpango-1.0-0 and not libpango-1.0.0)

8. I've installed Gluon:

sudo mv ./openjfx-17.0.2_monocle-linux-aarch64_bin-sdk.zip /opt/
cd /opt
unzip openjfx-17.0.2_monocle-linux-aarch64_bin-sdk.zip

9. I've cloned the sample:

cd ~pi
git clone https://github.com/openjfx/samples.git
cd samples/CommandLine/Modular/CLI/hellofx

compiled it:

javac --module-path /opt/javafx-sdk-17.0.2/lib --add-modules=javafx.controls src/hellofx/HelloFX.java -d dist

and run it:

sudo -E java -Dmonocle.platform=EGL -Dembedded=monocle -Dglass.platform=Monocle -Degl.displayid=/dev/dri/card1 -Dmonocle.egl.lib=/opt/javafx-sdk-17.0.2/lib/libgluon_drm-1.1.6.so --module-path /opt/javafx-sdk-17.0.2/lib/ --add-modules javafx.controls -cp dist/. hellofx.HelloFX

application runs:

[GluonDRM] use GPU at /dev/dri/card1 and display id -1
S0 NOT defined:
[GluonDRM] We have 2 connectors
[GluonDRM] ID for connector[0] = 32, width = 1920 and height = 1080
[GluonDRM] Height was 0 and is now 1080
[GluonDRM] ID for connector[1] = 32, width = 1920 and height = 1080
eglinit ok
eglbind ok
eglCreateWindowSurface called
requested number of screens, return 2
[GluonDRM] getWidth asked, return 1920
[GluonDRM] doGetHeight asked, vs = 0, fbw = 3840, fbh = 1080
[GluonDRM] getWidth asked, return 1920
[GluonDRM] doGetHeight asked, vs = 0, fbw = 3840, fbh = 1080
[NODRM] set cursor to 960, 540
SETCURSORIMAGE! with 1024 bytes
Gluon Commercial Features not unlocked.
Set the environment variable ENABLE_GLUON_COMMERCIAL_EXTENSIONS and
check the file <sdk>/legal/javafx.graphics/gluon.md for license information.

but nothing new is shown on screen (the Console still displays login prompt)

When I do:

export ENABLE_GLUON_COMMERCIAL_EXTENSIONS=true

application starts with:

[GluonDRM] use GPU at /dev/dri/card1 and display id -1
S0 NOT defined:
[GluonDRM] We have 2 connectors
[GluonDRM] ID for connector[0] = 32, width = 1920 and height = 1080
[GluonDRM] Height was 0 and is now 1080
[GluonDRM] ID for connector[1] = 32, width = 1920 and height = 1080
eglinit ok
eglbind ok
eglCreateWindowSurface called
requested number of screens, return 2
[GluonDRM] getWidth asked, return 1920
[GluonDRM] doGetHeight asked, vs = 0, fbw = 3840, fbh = 1080
[GluonDRM] getWidth asked, return 1920
[GluonDRM] doGetHeight asked, vs = 0, fbw = 3840, fbh = 1080
[NODRM] set cursor to 960, 540
SETCURSORIMAGE! with 1024 bytes
Gluon Commercial Features unlocked

but despite console login prompt going away - screen just flashes briefly and nothing is displayed

Of course, if I download regular SDK:

wget https://download2.gluonhq.com/openjfx/18/openjfx-18-ea+10_linux-aarch64_bin-sdk.zip

instead of Monocle, I get:

java.lang.ClassNotFoundException: com.sun.glass.ui.monocle.MonoclePlatformFactory

What can I do to see the app on the screen?