Select the project property for the construct2 then go in orientation and select as "landscape" ...in full screen browser I have selected Scale Inner and my window size is 1152X648.
I have followed the crosswalk export which is given by scirra and then update it on the XDK intel project ... but suppose if you export the code into crosswalk and then you build the app using intel cloud service ...after that it will provide you two types of apps ARM and x86 just try the one that works for your android ... install the apk in your android.
Using above way i am able to see my application starts only in landscape mode and works fine perfectly.... (Remember i am not using APP Browser here to test my app)
But when i use the same code for ipad , i had to test it with APP Browser of Intel XDK....using that i see only potrait mode and it does not work with landscape...now i dont know how to test the real app by deploying it on my ipad maybe the issue is because of APP Browser which is not allowing to see the app in landscape mode...
so my question is how you are viewing your APP??? by installing the apk on your android or by APP Browser of XDK?