"NV-GLX" missing when using vulkan backend

[cysin]

OS: CentOS 7.6
GPU: 1080Ti + 430.14 driver
VULKAN: 1.1.106.0
Any help is appreciated, Thanks !

# ./backendTest.out 
Xlib:  extension "NV-GLX" missing on display ":0".
Invalide device for support vulkan
Invalide device for support vulkan
Test forward type: 0
Tolerance Rate: 0.050000
Open Model (null)
Segmentation fault (core dumped)

[wangqiang1588]

try https://devtalk.nvidia.com/default/topic/1027746/linux-graphics-debugger/xlib-extension-quot-nv-glx-quot-missing-on-display-quot-1-quot-/

maybe it's a driver bug

[wangqiang1588]

or amonakov/primus#73

[wangqiang1588]

maybe your compute have two GPUs ,one is intel another is Nvidia, program default use device 0 , Intel's GPU is device 0 ,and Nvidia's GPU is device 1 .please check this

[cysin]

Thanks for the reply. The first two links don't help. I indeed have two GPUs, but both of them are NV's cards, the same model.

[wangqiang1588]

sorry ,the log "Invalide device for support vulkan" twice, so maybe enumeratePhysicalDevices failed ,please modify const bool VulkanInstance::supportVulkan() function ,and print error code

[cysin]

it's -3.
VK_ERROR_INITIALIZATION_FAILED = -3

so a vulkan driver compatible issue?

[wangqiang1588]

try run vulkaninfo on terminal , is it success ?

[wangqiang1588]

try export VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/nvidia_icd.json maybe the dir is not this ,please change this ,then relaunch ./backendTest.out

[cysin]

vulkaninfo output:

# vulkaninfo 
Xlib:  extension "NV-GLX" missing on display ":0".
==========
VULKANINFO
==========

Vulkan Instance Version: 1.1.106

/home/lunarg/sdk-build/Vulkan-Tools/vulkaninfo/vulkaninfo.c:5523: failed with VK_ERROR_INITIALIZATION_FAILED

the json file is located at:
/etc/vulkan/icd.d/nvidia_icd.json

I tried:
export VK_ICD_FILENAMES=/etc/vulkan/icd.d/nvidia_icd.json

then ran ./backendTest.out， still no lucky with the same error

[wangqiang1588]

if vulkaninfo works incorrect , another application will not work too.

Check if you have vulkan-intel installed, it may prevent Nvidia's vulkan driver from being detected

[wangqiang1588]

following https://wiki.archlinux.org/index.php/Vulkan#Nvidia_-_vulkan_is_not_working_and_can_not_initialize

[wangqiang1588]

your computer CPU is Intel desktop or Xeon ？ usually desktop CPU has an eGPU.

[wangqiang1588]

https://devtalk.nvidia.com/default/topic/1044881/linux/vulkaninfo-vulkaninfo-c-3339-failed-with-vk_error_initialization_failed/

[wangqiang1588]

that works for Fedora ,maybe it works on CentOS too, but maybe dnf is not exists on CentOS ,so try yum install that.