White screen when I start the launcher 1.6.11

Hi,

I wanted to play again to Minecraft, (I didnt play since then 6/7 months..) so I installed the new launcher (1.6.11) and I launched the Minecraft.exe then.

The game is download with the little screen "Downloading Runtime....xx/yyy" or something like that, then the game launch and put a grey screen like that;

(attachment image)

So the login screen doesn't appear..

I tried:

To uninstall/reinstall Minecraft with the .msi installer file, and directly .exe file, but nothing.

I tried to uninstall/reinstall all my Java versions and put the new Java 8 Update 31, still nothing.