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Here is the copy of the crash report.

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 5/29/15 10:28 PM
Description: Initializing game

java.lang.RuntimeException: org.lwjgl.LWJGLException: X Error - disp: 0xffffffff8c1834b0 serial: 159 error: GLXUnsupportedPrivateRequest request_code: 155 minor_code: 16
at org.lwjgl.opengl.Display.update(Display.java:648)
at org.lwjgl.opengl.Display.update(Display.java:628)
at org.lwjgl.opengl.Display.initContext(Display.java:1036)
at org.lwjgl.opengl.Display.create(Display.java:853)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at ave.ap(SourceFile:534)
at ave.am(SourceFile:363)
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)
Caused by: org.lwjgl.LWJGLException: X Error - disp: 0xffffffff8c1834b0 serial: 159 error: GLXUnsupportedPrivateRequest request_code: 155 minor_code: 16
at org.lwjgl.opengl.LinuxDisplay.globalErrorHandler(LinuxDisplay.java:320)
at org.lwjgl.opengl.LinuxContextImplementation.nSwapBuffers(Native Method)
at org.lwjgl.opengl.LinuxContextImplementation.swapBuffers(LinuxContextImplementation.java:79)
at org.lwjgl.opengl.ContextGL.swapBuffers(ContextGL.java:175)
at org.lwjgl.opengl.DrawableGL.swapBuffers(DrawableGL.java:90)
at org.lwjgl.opengl.Display.swapBuffers(Display.java:618)
at org.lwjgl.opengl.Display.update(Display.java:646)
... 9 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at org.lwjgl.opengl.Display.update(Display.java:648)
at org.lwjgl.opengl.Display.update(Display.java:628)
at org.lwjgl.opengl.Display.initContext(Display.java:1036)
at org.lwjgl.opengl.Display.create(Display.java:853)
at org.lwjgl.opengl.Display.create(Display.java:757)
at org.lwjgl.opengl.Display.create(Display.java:739)
at ave.ap(SourceFile:534)
at ave.am(SourceFile:363)

-- Initialization --
Details:
Stacktrace:
at ave.a(SourceFile:310)
at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
Minecraft Version: 1.8.6
Operating System: Linux (i386) version 3.16.0-30-generic
CPU: 4x Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz
Java Version: 1.7.0_80, Oracle Corporation
Java VM Version: Java HotSpot(TM) Server VM (mixed mode), Oracle Corporation
Memory: 2013992 bytes (1 MB) / 149037056 bytes (142 MB) up to 523501568 bytes (499 MB)
JVM Flags: 5 total; -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.6
LWJGL: 2.9.4
OpenGL: Mesa DRI Intel(R) Sandybridge Mobile x86/MMX/SSE2 GL version 1.4 (3.0 Mesa 10.3.2), Intel Open Source Technology Center
GL Caps:
Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ~~ERROR~~ NullPointerException: null
Profiler Position: N/A (disabled)

sudo apt-get install nvidia-current

I've done this, but when I look at my additional drivers, I see that the current one being used is the "legacy binary driver version 304.125" should I change this to the "binary driver version 331.113". If yes, do I use the "-updates" or the standard one? the standard one is marked as "tested", while the -updates is not.

Additional notes: I'm running one monitor, and this is a fresh install of Ubuntu. I've done sudo apt-get update and sudo apt-get upgrade

One more thing: I see that its using the Intel integrated graphics, rather than my GPU. Is there a way to force it to use the GPU?