Hi, Thanks all for your help. But I sill have the problem. But more info now. I've managed to removed a lot of code from my effect driver. I also made sure that it was working fine without the framebuffer. Here is what happen: I have three static library used by this project. It seems to have problem "big time" to link with those libraries. Now if I play (adding and removing them from the project) gets me in trouble. I can kextload my dirver, but the ioregistry will stop working and I won't be able to kextunload... If I stub my kext and don'T link with those libraries it works fine(for what it is supposed to do whithout the libs!) Any Idea ? Can I merge the two libs in one with ld ? Francis _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.