Offscreen rendering don't seem to work under Linux and Vulkan

Development Asset Creation FX
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I am also facing problems with Linux+Vulkan and offscreen rendering. I am trying my packaged binaries in a docker container, and while they work with -opengl4, the default Vulkan mode does not run at all, even if the DISPLAY argument is set to enable GUI. The errors I am getting are:




 [2020.03.23-00.01.47:970]  0]LogVulkanRHI: Error: VulkanRHI::vkGetPhysicalDeviceSurfaceFormatsKHR(Device.GetPhysicalHandle(), Surface, &NumFormats, nullptr) failed,  
VkResult=-3  at /media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanSwapChain.cpp:152   with error VK_ERROR_INITIALIZATION_FAILED  
Fatal error: [File:/media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanUtil.cpp] [Line: 772]    VulkanRHI::vkGetPhysicalDeviceSurfaceFormatsKHR(Device.GetPhysicalHandle(), Surface, &NumFormats, nullptr) failed,  
VkResult=-3  at /media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanSwapChain.cpp:152   with error VK_ERROR_INITIALIZATION_FAILED [2020.03.23-00.01.47:976]  0]LogCore: Error: appError called: Fatal error: [File:/media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanUtil.cpp] [Line: 772]   
VulkanRHI::vkGetPhysicalDeviceSurfaceFormatsKHR(Device.GetPhysicalHandle(), Surface, &NumFormats, nullptr) failed, VkResult=-3  at /media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanSwapChain.cpp:152   with error VK_ERROR_INITIALIZATION_FAILED  
0x00000000043ef89f AirSimNH!UnknownFunction(0x41ef89e)  
0x000000000441f563 AirSimNH!UnknownFunction(0x421f562)  
0x000000000441f38a AirSimNH!UnknownFunction(0x421f389)  
0x0000000004424618 AirSimNH!UnknownFunction(0x4224617)  
0x000000000485f4e1 AirSimNH!UnknownFunction(0x465f4e0)  
0x0000000003387e6d AirSimNH!UnknownFunction(0x3187e6c)  
0x00000000050e114f AirSimNH!UnknownFunction(0x4ee114e)  
0x0000000004c12039 AirSimNH!UnknownFunction(0x4a12038)  
0x00000000026e68d5 AirSimNH!UnknownFunction(0x24e68d4)  
0x00000000026dcf6a AirSimNH!UnknownFunction(0x24dcf69)  
0x0000000005f834dd AirSimNH!UnknownFunction(0x5d834dc)  
0x00007f62a98fcb97 libc.so.6!__libc_start_main(+0xe6)  
0x00000000026d0029 AirSimNH!UnknownFunction(0x24d0028)      
Signal 11 caught.  
Malloc Size=65538 LargeMemoryPoolOffset=65554  
CommonUnixCrashHandler: Signal=11  
Malloc Size=65535 LargeMemoryPoolOffset=131119  
Malloc Size=99968 LargeMemoryPoolOffset=231104  
[2020.03.23-00.01.48:004]  0]LogCore: === Critical error: === Unhandled Exception: SIGSEGV: invalid attempt to write memory at address 0x0000000000000003  
2020.03.23-00.01.48:004]  0]LogCore: Fatal error: [File:/media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanUtil.cpp] [Line: 772]  VulkanRHI::vkGetPhysicalDeviceSurfaceFormatsKHR(Device.GetPhysicalHandle(), Surface, &NumFormats, nullptr) failed, VkResult=-3  at /media/UE/Engine/Source/Runtime/VulkanRHI/Private/VulkanSwapChain.cpp:152   with error VK_ERROR_INITIALIZATION_FAILED
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