vkGetPhysicalDeviceSurfaceCapabilitiesKHR gives VkErrorInitializationFailed for xcb surface

[sunbearc22]

Issue: I obtained the following error in my code for an xcb surface during vulkan command 'vkGetPhysicalDeviceSurfaceCapabilitiesKHR'.

File "~/.local/lib/python3.5/site-packages/vulkan/_vulkan.py", line 5207, in vkGetPhysicalDeviceSurfaceCapabilitiesKHR
    raise exception_codes[result]
vulkan._vulkan.VkErrorInitializationFailed

To investigate the issue, I used your example_sdl2.py script and substituted all definitions pertaining to xlib with xcb. And I got the same error msg.

Changes made to example_sdl2.py:

1. replaced line 60 with extensions.append('VK_KHR_xcb_surface')
2. replaced lines 101 to 109 with

   def surface_xcb():
   print("Create Xcb surface")
   vkCreateXcbSurfaceKHR = vkGetInstanceProcAddr(instance, "vkCreateXcbSurfaceKHR")
   surface_create = VkXcbSurfaceCreateInfoKHR(
           sType = VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR,
           connection = wm_info.info.x11.display,
           window = wm_info.info.x11.window,
           flags = 0)
   return vkCreateXcbSurfaceKHR(instance, surface_create, None)

3. replaced line 140 with sdl2.SDL_SYSWM_X11: surface_xcb

The xlib version of example_sdl2.py works well on my system.

Question: Is VkErrorInitializationFailed due to an issue in vulkan or Vulkan?

[realitix]

Hello @sunbearc22, Sorry for my late reply.

I think the problem comes from your Vulkan driver. To be sure, you can enable the debug layer, maybe you will find informations.

[realitix]

Hello @sunbearc22, I close this issue, you can reopen if you have more elements.