Minecraft crash en 1.8.1

Quand je me connecte je vois le logo mojang, puis écran noir, puis écran blanc, je décide de fermer le jeu : la on me met un message Java(TM) platform SE binary ne répond pas. Je ferme le programme et je me retrouve avec ceci sous les yeux :

[12:59:02] [Client thread/INFO]: Setting user: cocottelapoule
[12:59:02] [Client thread/INFO]: (Session ID is token:8691e4d9696e4af8a5857478f57d72d4:ffb435526eb54ea7bb1dd691d7732aae)
[12:59:05] [Client thread/INFO]: LWJGL Version: 2.9.1
[12:59:05] [Client thread/INFO]: Reloading ResourceManager: Default
[12:59:13] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:59:13] [Thread-6/INFO]: Initializing LWJGL OpenAL
[12:59:13] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80070490
AL lib: (EE) MMDevApiOpenPlayback: Device init failed: 0x80070490
[12:59:13] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'
[12:59:13] [Thread-6/ERROR]: Unable to initialize OpenAL. Probable cause: OpenAL not supported.
[12:59:13] [Thread-6/WARN]: ERROR MESSAGE:
[12:59:13] [Thread-6/INFO]: Could not locate OpenAL library.
[12:59:13] [Thread-6/WARN]: STACK TRACE:
[12:59:13] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:151)
[12:59:13] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:102)
[12:59:13] [Thread-6/INFO]: org.lwjgl.openal.AL.create(AL.java:201)
[12:59:13] [Thread-6/INFO]: paulscode.sound.libraries.LibraryLWJGLOpenAL.init(LibraryLWJGLOpenAL.java:164)
[12:59:13] [Thread-6/INFO]: paulscode.sound.SoundSystem.CommandNewLibrary(SoundSystem.java:1576)
[12:59:13] [Thread-6/INFO]: paulscode.sound.SoundSystem.CommandQueue(SoundSystem.java:2572)
[12:59:13] [Thread-6/INFO]: paulscode.sound.CommandThread.run(CommandThread.java:121)
[12:59:14] [Sound Library Loader/WARN]: ERROR MESSAGE:
[12:59:14] [Sound Library Loader/INFO]: Could not locate OpenAL library.
[12:59:14] [Sound Library Loader/INFO]: Starting up SoundSystem...
[12:59:14] [Thread-8/INFO]: Switching to No Sound
[12:59:14] [Thread-8/INFO]: (Silent Mode)
[12:59:14] [Sound Library Loader/INFO]: Sound engine started
[12:59:15] [Client thread/INFO]: Created: 512x512 textures-atlas