`--> optirun ./primus_vk_diag vulkan
PrimusVK-diagnostic: Creating Vulkan instance
Xlib:  extension "NV-GLX" missing on display ":0".
Xlib:  extension "NV-GLX" missing on display ":0".
PrimusVK-diagnostic: Device: Intel(R) HD Graphics 630 (Kaby Lake GT2)
PrimusVK-diagnostic:  Type: 1
PrimusVK-diagnostic:  API: 1.1.90
PrimusVK-diagnostic:    Queues: 1
Device creation succeeded
PrimusVK-diagnostic: Destroying Vulkan: 0x561e4c9af760


`--> optirun env DISPLAY=:8 ./primus_vk_diag vulkan
PrimusVK-diagnostic: Creating Vulkan instance
PrimusVK-diagnostic: Device: GeForce GTX 1050
PrimusVK-diagnostic:  Type: 2
PrimusVK-diagnostic:  API: 1.1.84
PrimusVK-diagnostic:    Queues: 3
Device creation succeeded
PrimusVK-diagnostic: Device: GeForce GTX 1050
PrimusVK-diagnostic:  Type: 2
PrimusVK-diagnostic:  API: 1.1.84
PrimusVK-diagnostic:    Queues: 3
Device creation succeeded
PrimusVK-diagnostic: Device: Intel(R) HD Graphics 630 (Kaby Lake GT2)
PrimusVK-diagnostic:  Type: 1
PrimusVK-diagnostic:  API: 1.1.90
PrimusVK-diagnostic:    Queues: 1
Device creation succeeded
PrimusVK-diagnostic: Destroying Vulkan: 0x55ef58bb0300