PY5 and RISC-V

[claudefalbriard]

I did a machine upgrade moving to the RISC-V board under Ubuntu 24 OS. I've also installed and configured the Open JDK 26 for this architecture, together with standard Python 12, virtual environment, and also the latest Py5 package. For IDE I've chosen the Thonny package. When testing some showcases under Py5 I get an error when defining a screen size above 600x600 (P3D mode). Below that, it runs fine, also with some rather long loading time. The Orange RV2 RISC-V is an 8 core cpu. Above that limit, the screen does not open, but also getting no error or debug message.
Yet another error shows up at the Thonny log space telling that the sketch is throwing a Java InInizialiationError. Sometimes able to run it by cleaning the setup() section defining solely the size parameter, moving other parameters into global space. Please give me some hints of what could be adjusted to load the sketches in the new environment.

[villares]

Thank you @claudefalbriard for bringing this up! I'm so glad you have been testing py5 on RISC platforms.

Your report about reducing setup() reminded me of this, which I don't know if would help, but you might like to know: py5 manipulates the setup() function separating it into two functions settings() and setup(). So you might want to try something like (in module mode, that is with the Thonny plug-in turned off):

import py5

def settings():
     py5.size(600, 600, py5.P3D)

def setup():
    # other stuff
    py5.background(200)

py5.run_sketch()

Can you tell us more about the Open JDK Java install you have? Maybe running java -version?

[claudefalbriard]

Below a hardcopy from the java--version comand adjusted to Ubuntu's RISC-V arquitecture:

java --versionjava --version
openjdk 25.0.2 2026-01-20
OpenJDK Runtime Environment (build 25.0.2+10-Ubuntu-124.04)
OpenJDK 64-Bit Server VM (build 25.0.2+10-Ubuntu-124.04, mixed mode, sharing)

Thanks Villlares, will reorganize the settings and setup section and split it as suggested, also trying first execution in the module mode.

[claudefalbriard]

See the LOG messages below including the Java error:

OpenJDK 64-Bit Server VM (build 25.0.2+10-Ubuntu-124.04, mixed mode, sharing)
Java exception thrown by Sketch.runSketch:
java.lang.ExceptionInInitializerError
Using pip 24.0 from /usr/lib/python3/dist-packages/pip (python 3.12)
Defaulting to user installation because normal site-packages is not writeable
Created temporary directory: /tmp/pip-build-tracker-u9objard
Initialized build tracking at /tmp/pip-build-tracker-u9objard
Created build tracker: /tmp/pip-build-tracker-u9objard
Entered build tracker: /tmp/pip-build-tracker-u9objard
Created temporary directory: /tmp/pip-install-vxcx3908
Created temporary directory: /tmp/pip-ephem-wheel-cache-ipha9uy8
Requirement already satisfied: cryptography in /usr/lib/python3/dist-packages (41.0.7)
Created temporary directory: /tmp/pip-unpack-iawfe55_
Removed build tracker: '/tmp/pip-build-tracker-u9objard'

[hx2A]

Hi @claudefalbriard !

I am not familiar with the RISC-V boards but suspect you might be running into some graphics limitations of what those boards can do. Can you try installing the Processing IDE to see if you can run a Java Sketch that is larger than 600x600. If you can't run a Sketch through the PDE that is larger than 600x600, then py5 won't be able to either.

Can you run a Sketch with the default renderer that is larger than 600x600?

Also, can you provide a link to the technical details of the specific board you are using?