MON MINECRAFT ascentia me met couldn't set pixel format ?????

Bonjour, JE VIENS DE PASSER SUR WINDOWS 8 et mon minecraft ne veux plus demarrer ?(jai beaucoup regarder sur des forums et essayer de reinstaller java mais ca ne marche pas) VOICI CE QUIL ME MET :

Vous utilisez java 64 bits.
Mémoire (RAM) recommandée: 1G
Mémoire (RAM) sélectionné: 1G
C:\Program Files\Java\jre1.8.0_51\bin\javaw.exe -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -Djava.library.path=C:\Users\un\AppData\Roaming\.ascentia\natives -classpath C:\Users\un\AppData\Roaming\.ascentia\libraries\realms-1.3.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\commons-compress-1.8.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\httpclient-4.3.3.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\commons-logging-1.1.3.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\httpcore-4.3.2.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\vecmath-1.3.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\trove4j-3.0.3.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\icu4j-core-mojang-51.2.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\jopt-simple-4.5.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\codecjorbis-20101023.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\codecwav-20101023.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\libraryjavasound-20101123.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\librarylwjglopenal-20100824.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\soundsystem-20120107.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\netty-all-4.0.10.Final.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\guava-15.0.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\commons-lang3-3.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\commons-io-2.4.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\commons-codec-1.9.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\jinput-2.0.5.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\jutils-1.0.0.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\gson-2.2.4.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\authlib-1.5.16.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\log4j-api-2.0-beta9.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\log4j-core-2.0-beta9.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\lwjgl-2.9.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\lwjgl_util-2.9.1.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\lwjgl-platform-2.9.1-natives-windows.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\jinput-platform-2.0.5-natives-windows.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\twitch-5.16.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\twitch-platform-5.16-natives-windows-64.jar;C:\Users\un\AppData\Roaming\.ascentia\libraries\twitch-external-platform-4.5-natives-windows-64.jar;C:\Users\un\AppData\Roaming\.ascentia\bin\minecraft.jar net.minecraft.client.main.Main -version 1 --username DarkHD --launcher 6.0
[10:10:09] [main/INFO]: Setting user: DarkHD
[10:10:09] [main/INFO]: (Session ID is token:0:DarkHD)
Completely ignored arguments: [--launcher, 6.0]
[10:10:11] [Client thread/INFO]: LWJGL Version: 2.9.1
[10:10:11] [Client thread/ERROR]: Couldn't set pixel format
org.lwjgl.LWJGLException: Pixel format not accelerated
at org.lwjgl.opengl.WindowsPeerInfo.nChoosePixelFormat(Native Method) ~[lwjgl-2.9.1.jar:?]
at org.lwjgl.opengl.WindowsPeerInfo.choosePixelFormat(WindowsPeerInfo.java:52) ~[lwjgl-2.9.1.jar:?]
at org.lwjgl.opengl.WindowsDisplay.createWindow(WindowsDisplay.java:252) ~[lwjgl-2.9.1.jar:?]
at org.lwjgl.opengl.Display.createWindow(Display.java:306) ~[lwjgl-2.9.1.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:848) ~[lwjgl-2.9.1.jar:?]
at org.lwjgl.opengl.Display.create(Display.java:757) ~[lwjgl-2.9.1.jar:?]
at mR.hD(Unknown Source) [minecraft.jar:?]
at mR.f(Unknown Source) [minecraft.jar:?]
at net.minecraft.client.main.Main.main(Unknown Source) [minecraft.jar:?]
Exception in thread "Client thread" java.lang.NullPointerException
at Bc.a(Unknown Source)
at mC.e(Unknown Source)
at mC.av(Unknown Source)
at mR.f(Unknown Source)
at net.minecraft.client.main.Main.main(Unknown Source)