How to enable DRI3 on Ubuntu 16.04

Question

I'm trying to learn Vulkan, so I install the Mesa Vulkan drivers and development files.

I downloaded some examples. I compiled the examples and tried to execute one. But when I run the file from terminal, it gave one warning and error:

WARNING: Haswell Vulkan support is incomplete
Error: No DRI3 support

I ask it from the person who wrote the example program, he said I have to enable the DRI3 for the running program. How can I do it in Ubuntu 16.04?

When I open the file "/etc/X11/xorg.conf", I see this:

Section "Device"
    Identifier "Default Card 0"
    BusID "PCI:0@0:2:0"
EndSection

What I need to do?

My environment: I'm using Intel Core i5 and Intel Haswell GPU.

Answer 1

Open this file: /etc/X11/xorg.conf.d/20-intel.conf as root and make the device section look like this

Section "Device"
   Identifier  "Intel Graphics"
   Driver      "intel"
   Option      "DRI"    "3"
EndSection

This is from the Arch wiki for Vulkan.