Here in this case, it disables java graphical display features
A server does not have a "display" or GUI - so with this line you disable these features
I think it is some kind of linux thing
https://www.oracle.com/technical-resources/articles/javase/headless.html
Put this line into the user_jvm_args.txt
Or try
java -Djava.awt.headless=true @user_jvm_args.txt @libraries/net/minecraftforge/forge/1.20.1-47.3.25/unix_args.txt "$@"
pause
Get the drivers from the official site:
https://www.amd.com/en/support/downloads/drivers.html/processors/ryzen/ryzen-5000-series/amd-ryzen-7-5800h.html
Create a new instance and start with Embeddium + Oculus
Then add new mods one by one or in groups
The "IncompatibleClassChangeError: class net.coderbot.iris.gui.option.ShadowDistanceOption" often appears in connection with an incompatible mod