Doesn't work :(
It tries to use Vulkan, but that's probably not available on my system.
4.21.0-4541578+++UE4+Release-4.21 517 0 Disabling core dumps. Unable to read VR Path Registry from /home/user/.config/openvr/openvrpaths.vrpath Xlib: extension "NV-GLX" missing on display ":0.0". Xlib: extension "NV-GLX" missing on display ":0.0". LowLevelFatalError [File:Unknown] [Line: 669] VulkanRHI::vkCreateDevice(Gpu, &DeviceInfo, VULKAN_CPU_ALLOCATOR, &Device) failed, VkResult=-3 at D:\Build\++UE4\Sync\Engine\Source\Runtime\VulkanRHI\Private\VulkanDevice.cpp:285 with error VK_ERROR_INITIALIZATION_FAILED Signal 11 caught. Malloc Size=65538 LargeMemoryPoolOffset=65554 CommonUnixCrashHandler: Signal=11 Malloc Size=65535 LargeMemoryPoolOffset=131119 Malloc Size=68112 LargeMemoryPoolOffset=199248 Malloc Size=118144 LargeMemoryPoolOffset=317408 Engine crash handling finished; re-raising signal 11 for the default handler. Good bye.