Unable to launch on Linux

[asrieldashie]

Describe the bug
opsu does not extract natives upon launch:

Extracting the natives manually from the jar results in different error:

From .opsu.log:

Fri Jan 09 04:25:18 CST 2026 ERROR:** Uncaught Exception! **
Fri Jan 09 04:25:18 CST 2026 ERROR:/home/ivan/Games/opsu/Natives/liblwjgl64.so: /usr/lib/jvm/java-21-temurin-jdk/lib/libjawt.so: version `SUNWprivate_1.1' not found (required by /home/ivan/Games/opsu/Natives/liblwjgl64.so)
java.lang.UnsatisfiedLinkError: /home/ivan/Games/opsu/Natives/liblwjgl64.so: /usr/lib/jvm/java-21-temurin-jdk/lib/libjawt.so: version `SUNWprivate_1.1' not found (required by /home/ivan/Games/opsu/Natives/liblwjgl64.so)
	at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
	at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(NativeLibraries.java:331)
	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:197)
	at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(NativeLibraries.java:139)
	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2418)
	at java.base/java.lang.Runtime.load0(Runtime.java:852)
	at java.base/java.lang.System.load(System.java:2025)
	at org.lwjgl.Sys$1.run(Sys.java:70)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:319)
	at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
	at org.lwjgl.Sys.loadLibrary(Sys.java:87)
	at org.lwjgl.Sys.<clinit>(Sys.java:117)
	at org.lwjgl.opengl.Display.<clinit>(Display.java:135)
	at org.newdawn.slick.AppGameContainer$1.run(AppGameContainer.java:39)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:319)
	at org.newdawn.slick.AppGameContainer.<clinit>(AppGameContainer.java:36)
	at itdelatrisu.opsu.Opsu.main(Opsu.java:183)

From what I've read from few searches that this error was caused by lwjgl being too old and does not support newer Java versions.

However, some custom builds of lwjgl natives does make the game launch such as this and this.

To Reproduce
Steps to reproduce the behavior:

1. Try to launch the game.

Expected behavior
The game launches.

Platform:

• Device: Acer Nitro 5 (AN515-56)
• OS: Fedora 43
• opsu! 1.4.0
• OpenJDK Runtime Environment Temurin-21.0.9+10 (build 21.0.9+10-LTS)/25.0.1+8 (build 25.0.1+8-LTS)

[CloneWith]

Hi asrieldashie!

A similar bug report exists in discussions, and you could try the solution in that thread.

This reminds me of the native library issue again, and it should be fixed in a few days hopefully 😹

[CloneWith]

However, some custom builds of lwjgl natives does make the game launch such as this and this.

After a quick review the gdx-backend-lwjgl-natives seems work, and a release with this dependency would come out soon. Thanks for your research!