Unity+Vuforia on x86 android device

I have done some testing with Vuforia and android. Vuforia samples for  native android work properly on my x86 android device. But with unity vuforia SDK, samples are not working on same device. The apps only show a black screen when is trying to show the camera.The log shows that qcarunitywrapper.so library could not be opened. I tried compiling both ways ARMv7 as FAT. With ARMv7 the app stops with a memory error: signal 11 , while FAT indicates that QCARUNITYPLAYER libraries could not be opened. (libvuforia.so is opened successfully)As I said, Vuforia with native android works well , then the problem seems to be the QCARUNITYPLAYER library. I'm using:Unity 5.1.2f1Vuforia -unity - 5-0-5.unitypackageDevice Android : Ice Cream Sandwich 4.0.3, Intel Medfield Processor 3.0.8  Has anyone been able to successfully execute an app with unity and Vuforia on an Intel device , or know how to solve this problem?