Arch Linux

davidmn

Member

Registered: 2012-01-28

Posts: 12

Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Hi,

I am having the issue where I get a black screen after logging into Minecraft. Specifically this is what appears in the terminal:

[davidmn@asgard Downloads]$ java -jar minecraft.jar 
27 achievements
174 recipes
Setting user: davidmn, -7917224269415528924
Exception in thread "Minecraft main thread" java.lang.UnsatisfiedLinkError: /home/davidmn/.minecraft/bin/natives/liblwjgl.so: /home/davidmn/.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)

This is the result of "java -version":

OpenJDK Runtime Environment (IcedTea7 2.0) (ArchLinux build 7.b147_2.0-6-x86_64)
OpenJDK 64-Bit Server VM (build 21.0-b17, mixed mode)

I'm running 64bit and have an NVidia graphics card with the driver reccomened in the Beginners Guide. Any suggestions would be welcome.

Last edited by davidmn (2012-02-10 22:10:43)

alphaniner

Member

From: Ancapistan

Registered: 2010-07-12

Posts: 2,810

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Found this by googling minecraft liblwjgl

---

But whether the Constitution really be one thing, or another, this much is certain - that it has either authorized such a government as we have had, or has been powerless to prevent it. In either case, it is unfit to exist.
-Lysander Spooner

davidmn

Member

Registered: 2012-01-28

Posts: 12

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Ah cool. What does that actually do? Would be nice to know/learn.

alphaniner

Member

From: Ancapistan

Registered: 2010-07-12

Posts: 2,810

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

What did do?  Did it fix the problem?

---

But whether the Constitution really be one thing, or another, this much is certain - that it has either authorized such a government as we have had, or has been powerless to prevent it. In either case, it is unfit to exist.
-Lysander Spooner

davidmn

Member

Registered: 2012-01-28

Posts: 12

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Haven't tried it yet, I'm currently away from the Arch machine.

davidmn

Member

Registered: 2012-01-28

Posts: 12

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

I just got back to the machine and tried that. No joy. Same error message.

alphaniner

Member

From: Ancapistan

Registered: 2010-07-12

Posts: 2,810

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Same error?  That doesn't sound right.  Did you start MC from the same terminal where you ran the command?  I think that's necessary when exporting a variable from the command line.

---

But whether the Constitution really be one thing, or another, this much is certain - that it has either authorized such a government as we have had, or has been powerless to prevent it. In either case, it is unfit to exist.
-Lysander Spooner

davidmn

Member

Registered: 2012-01-28

Posts: 12

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

I did. I managed to fix this by installing Minecraft from the AUR and everything works beautifully now.

MisterAnderson

Member

Registered: 2011-09-04

Posts: 285

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Having this problem (probably similar but new) and installing minecraft from the AUR works perfectly.

---

D:

VioletPill

Member

Registered: 2012-07-22

Posts: 7

Re: Minecraft Black Screen (wrong ELF class) [SOLVED-ISH]

Just blindly running commands wont really help you in the long run.
The command bellow

$ export LD_LIBRARY_PATH="/opt/java/jre/lib/i386" 

expects that you have installed java in /opt/java.
You should always atleast check the if the folders/files exist.

Openjdk in arch is installed by default
/usr/lib/jvm/java-7-openjdk/

Check where is java installed on your system :

$ echo ${JAVA_HOME}

So for 86_64 architecture would be command like this:

$ export LD_LIBRARY_PATH="/usr/lib/jvm/java-7-openjdk/jre/lib/amd64/" 

There's absolutely no need to install minecraft AUR package to fix this problem.

Last edited by VioletPill (2012-08-04 09:47:58)