Cardboard enable touch input

Hello everybody.
I am developing an Unity VR app that uses Google Cardboard SDK. I have a scene with 360 degree picture placed on globe (space). In it I have some animal models and I am also using Gvr Pointer Graphic Raycaster as an interaction with those animal models. Before entering to the globe I have created canvas (that is not running in VR mode) with two buttons where the user can select to view scene in VR mode or Normal (non-VR) mode. If the user selects VR mode the app loads Cardboard device and enables VR mode, otherwise it acts like a normal Unity scene. (with VR mode disabled). For selecting one of the buttons (to toggle VR or non-VR mode) you have to be on it with Gvr Pointer and you also have to touch the screen. What I want to achieve is to disable Gvr Pointer on starting canvas and enable selecting the button only with touching on it. Then when the globe (space) is loaded I want to enable Gvr Pointer. Or just to enable selecting the button with touching on it (the Gvr Pointer can stay). How can I do this?

I’m having the same problem. Did you find the solution?

My canvas buttons are not working and I need a couple to switch between Carboard View and VR Normal View.

Thanks.