Vulkan validation layers don't load/work on Linux - linux

Question

I have basic Vulkan application, "Hello triangle",derived from this tutorial. In debug mode I use two validations layers:
VK_LAYER_KHRONOS_validation and VK_LAYER_LUNARG_monitor
On Windows I got no problem. Both layers load, I can see FPS counter in the title bar. But I am experiencing different behaviour on Linux (Ubuntu 18.04).
Only VK_LAYER_LUNARG_monitor loads. No FPS counter appears in the title bar.
VK_LAYER_KHRONOS_validation fails to load with the error:
ERROR: libVkLayer_khronos_validation.so: cannot open shared object
file: No such file or directory
I performed Linux setup according to the guidelines appearing in this LunarG doc.
Put the whole LunarG SDK in an arbitrary location on my Linux
filesystem.
Sourced setup-env.sh into .profile file
Inside the setup-env.sh script I also added VK_LOADER_DEBUG=all in order to see detailed info from Vulkan Loader.
Verified that all the variables set by the script point to correct directories in the SDK. They do.
setup-env.sh:
VULKAN_SDK="$(dirname "$(readlink -f "${BASH_SOURCE:-$_}" )" )/x86_64"
export VULKAN_SDK
PATH="$VULKAN_SDK/bin:$PATH"
export PATH
LD_LIBRARY_PATH="$VULKAN_SDK/lib:${LD_LIBRARY_PATH:-}"
export LD_LIBRARY_PATH
VK_LAYER_PATH="$VULKAN_SDK/etc/vulkan/explicit_layer.d"
export VK_LAYER_PATH
export VK_LOADER_DEBUG=all
Here is the chunk I am gettin from debug output that show the failure of loading the layers:
DEBUG: Loading layer library
/home/platform-thirdparty/vulkan-sdk/1.1.121.1/x86_64/lib/libVkLayer_monitor.so
INFO: Inserted device layer VK_LAYER_LUNARG_monitor
(/home/platform-thirdparty/vulkan-sdk/1.1.121.1/x86_64/lib/libVkLayer_monitor.so)
Message:libVkLayer_khronos_validation.so: cannot open shared object
file: No such file or directory ERROR:
libVkLayer_khronos_validation.so: cannot open shared object file: No
such file or directory
Even though it says that
Inserted device layer VK_LAYER_LUNARG_monitor
The monitor doesn't work.
If I replace VK_LAYER_KHRONOS_validation with VK_LAYER_LUNARG_standard_validation I am getting the same load fail error.
The debugger also shows that the loader did find all the manifest files for all the layers in the SDK.
I have no clue what else can be a problem.
My system setup:
Ubuntu 18.04 64bit, Nvidia RTX 3000
Nvidia Drivers: 430.0
VulkanSDK(LunarG): 1.1.121.1

Answer 1

In this SO question lies the answer by user1824407.
It appears that in the latest Ubuntu distributions (at least in 18.04 I use) setting LD_LIBRARY path into config files like:
.profile or /etc/environment or .bashrc
Doesn't take any effec.And indeed,I tried adding the lib path to all of those files, the libs didn't load even that echo $LD_LIBRARY_PATH printed the pass I set.
And only when I added the path with the Vulkan validation layers location to /etc/ld.so.conf.d/devlibs.conf where
devlibs.conf
is an arbitrary name I gave the file,now I see both VK_LAYER_LUNARG_monitor and VK_LAYER_KHRONOS_validation are loaded by Vulkan.