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When I try to run the Minecraft demo game on Ubuntu I get to a screen that says
"Minecraft Updating"
"Done loading"
But it was never done loading. I am not sure if I am being impatient or there is something wrong because I have left the game to update and when I returned 15-20 min later nothing had happened. Please help I have been through many different forums and tried installing Oracle Java 7 which I removed for OpenJDK Java 7. I added the LWJGL package to the .minecraft folder and still nothing has happened.

Thanks ahead of time!

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Start minecraft from command line with java -jar minecraft.jar and note the error message. If the error message mentions then use the solution from @Purplerob – Sergey Aug 29 '12 at 21:16

Try running:

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

before starting minecraft. The location might be different so you should hunt around in /usr/lib/jvm/[java folder]/ for a similar place.

I had this problem in arch and this solved it but because it was not ubuntu I'm guessing the location would be different.

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For some reason minecraft has stopped working with Java7 you should install openJDK6 and use that. To do so you should run sudo apt-get install openjdk-6-jre. Once this is doen make sure that that is the java being used by running

java -version

which should print

java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.3) (6b24-1.11.3-1ubuntu0.12.04.1)
OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)

if it does not display that then run:

sudo update-alternatives --config java

and select the /usr/lib/jvm/java-6-openjdk-amd64/jre/bin/java option.

Minecraft should work correctly after that.

(note if you are on a 32-bit machine replace amd64 with i386 and 64-Bit with 32-Bit)

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Tried everything, the only thing that worked was running it with Oracle Java 6 instead of Oracle Java 7.

See here for Java 6 install:

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