[20:52] java.lang.NullPointerException
[20:52] at net.minecraft.src.GuiMultiplayer.actionPerformed(GuiMultiplayer.java:133)
[20:52] at net.minecraft.src.GuiScreen.mouseClicked(GuiScreen.java:73)
[20:52] at net.minecraft.src.GuiMultiplayer.mouseClicked(GuiMultiplayer.java:284)
[20:52] at net.minecraft.src.GuiScreen.handleMouseInput(GuiScreen.java:120)
[20:52] at net.minecraft.src.GuiScreen.handleInput(GuiScreen.java:110)
[20:52] at net.minecraft.client.Minecraft.runTick(Minecraft.java:1003)
[20:52] at net.minecraft.client.Minecraft.run(Minecraft.java:480)
[20:52] at java.lang.Thread.run(Thread.java:636)
[20:52] Stopping!
[20:52]
[20:52] SoundSystem shutting down...
[20:52] Author: Paul Lamb, www.paulscode.com
[20:52]
[20:52] Exception in thread "Minecraft main thread" org.lwjgl.LWJGLException: X Error - disp: 0x7fbcc42fd490 serial: 325 error: BadWindow (invalid Window parameter) request_code: 2 minor_code: 0
[20:52] at org.lwjgl.opengl.LinuxDisplay.globalErrorHandler(LinuxDisplay.java:268)
[20:52] at org.lwjgl.opengl.LinuxKeyboard.nSetDetectableKeyRepeat(Native Method)
[20:52] at org.lwjgl.opengl.LinuxKeyboard.setDetectableKeyRepeat(LinuxKeyboard.java:152)
[20:52] at org.lwjgl.opengl.LinuxKeyboard.destroy(LinuxKeyboard.java:163)
[20:52] at org.lwjgl.opengl.LinuxDisplay.destroyKeyboard(LinuxDisplay.java:1015)
[20:52] at org.lwjgl.input.Keyboard.destroy(Keyboard.java:349)
[20:52] at net.minecraft.client.Minecraft.shutdownMinecraftApplet(Minecraft.java:417)
[20:52] at net.minecraft.client.Minecraft.run(Minecraft.java:586)
[20:52] at java.lang.Thread.run(Thread.java:636)