vtest picks the rendernode based on the order of how they are listed in /dev/dri/, add an option to pick one
I have a dual head setup with a AMD Polaris card (GL 4.5) and a AMD 5450 HD card (GL 3.3) and after a mainboard switch vtest started to pick the second card as EGL device, so I would no longer get GL 4.5 on the host.
Edited by Gert Wollny