1

Launch:

java -jar minecraft.jar

Exception after login:

Exception in thread "Minecraft main thread" java.lang.UnsatisfiedLinkError: /home/fabianhjr/.minecraft/bin/natives/liblwjgl.so: /home/fabianhjr/.minecraft/bin/natives/liblwjgl.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1928)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1825)
at java.lang.Runtime.load0(Runtime.java:792)
at java.lang.System.load(System.java:1059)
at org.lwjgl.Sys$1.run(Sys.java:69)
at java.security.AccessController.doPrivileged(Native Method)
at org.lwjgl.Sys.doLoadLibrary(Sys.java:65)
at org.lwjgl.Sys.loadLibrary(Sys.java:81)
at org.lwjgl.Sys.<clinit>(Sys.java:98)
at org.lwjgl.opengl.Display.<clinit>(Display.java:132)
at net.minecraft.client.Minecraft.a(SourceFile:180)
at net.minecraft.client.Minecraft.run(SourceFile:648)
at java.lang.Thread.run(Thread.java:722)

So far I have tried the following:

export LD_LIBRARY_PATH="/opt/java/jre/lib/amd64"
java -Xmx1024M -Xms512M -cp minecraft.jar net.minecraft.LauncherFrame

http://paste2.org/p/1849276

I am using openJDK 1.7.0, 64 under Fedora 16.

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7
  • Can we please get some more information about your system? Especially architecture and installed Fedora-Version (32 or 64-bit?). This looks like a problem between 32 and 64-bit, like your OS is 64bit but installed java 32bit, or vice versa or similar.
    – Bobby
    Commented Jan 22, 2012 at 15:20
  • F16(64 Bit), openjdk-1.7.0* for x86_64
    – Fabián Heredia Montiel
    Commented Jan 22, 2012 at 15:25
  • 2
    AFAIK openJDK is not supported by minecraft. Try with Sun's JDK.
    – Maerlyn
    Commented Jan 22, 2012 at 15:28
  • It could be that something went wrong while updating, you could try to get the lates lwjgl binaries yourself for your architecture and try with those.
    – Bobby
    Commented Jan 22, 2012 at 15:41
  • Not really to do with the question, but are you the LinuxOutlaws Fab? Given the confluence of Linux and Minecraft, it seems likely :D
    – SaintWacko
    Commented Jan 23, 2012 at 16:44

2 Answers 2

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8

OpenJDK is not supported by Minecraft. Install Sun's JDK.

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2

For what it's worth, a workaround to continue using OpenJDK is to copy the 64bit native libraries over their 32 bit counterparts, as the issue here is that it is loading the 32bit versions when it expects the 64bit version.

i.e. Copy every whatever64.so in your bin/natives folder over the whatever.so file. However, you will need to do this every update.

You may also need to download the latest LWJGL, depending on your Java version

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