Comment 17 for bug 1536081

Hmm, it should not break with the original stack, otherwise the patch wouldn't be useful. Just in case, I decided to test it by downgrading the graphics stack from Xenial to the default one. Installed the original kernel too (though it shouldn't matter here). Both libsdl2-2.0-0 and libsdl2-2.0-0:i386 were left installed, as expected. How did you test it to make something break?

As for -dev packages, isn't it a separate issue that's already present? I think I've seen this somewhere: someone tries to install -dev:i386 of some library, but it conflicts with -dev:amd64. I just reproduced it by trying to install libwayland-dev:i386 - it wants to remove libwayland-dev:amd64.

I know about new -hwe scheme in Xenial. But this patch isn't meant for Xenial. It's only for Trusty. But anyway, -hwe packages in Xenial are currently only for kernel and xorg. I don't see any -hwe packages for libwayland-egl1-mesa, for example.