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bulkin
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Joined: 08 Nov 2008
Posts: 20

PostPosted: Mon Jan 20, 2020 10:28 pm    Post subject: Reply with quote

Mesa should be built with vulkan support, then vulkan-loader should succeed in finding radv.

Code:

bulkin@bc:~$ vulkaninfo
ERROR: [Loader Message] Code 0 : libGLX_nvidia.so.0: cannot open shared object file: No such file or directory
ERROR: [Loader Message] Code 0 : /usr/lib32/libvulkan_radeon.so: wrong ELF class: ELFCLASS32
WARNING: radv is not a conformant vulkan implementation, testing use only.
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davydm
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Joined: 06 Jan 2017
Posts: 53

PostPosted: Tue Jan 21, 2020 3:26 am    Post subject: Reply with quote

Before completing a cleanup of nvidia drivers, I had this:
Code:

$ eselect opengl list
Available OpenGL implementations:
  [1]   nvidia
  [2]   xorg-x11 *


(ie, correct opengl selected); however vulkaninfo kept trying to use libGLX from nvidia. So having done
Code:

emerge --depclean nv-codec-headers nvidia-drivers


(nv-codec-headers was pulling in nvidia drivers), I now have an nvidia-free system and vulkaninfo errors with:

Code:

$ vulkaninfo
Cannot create Vulkan instance.
This problem is often caused by a faulty installation of the Vulkan driver or attempting to use a GPU that does not support Vulkan.
/var/tmp/portage/dev-util/vulkan-tools-1.1.124/work/Vulkan-Tools-119e7c3bbae122f6cc5d778d068fb91e0e85d6a9/vulkaninfo/vulkaninfo.h:291: failed with ERROR_INCOMPATIBLE_DRIVER


naturally, there's only one opengl implementation now, and it's selected:
Code:

$ eselect opengl list
Available OpenGL implementations:
  [1]   xorg-x11 *


The problem now isn't opengl -- native opengl games (eg quake3) are working fine, high framerate and glxinfo reports (amongst a lot of other data):
Code:

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org (0x1002)
    Device: AMD NAVI10 (DRM 3.35.0, 5.4.13-gentoo-x86_64, LLVM 9.0.1) (0x731f)
    Version: 19.3.2
    Accelerated: yes
    Video memory: 8192MB
    Unified memory: no
    Preferred profile: core (0x1)
    Max core profile version: 4.5
    Max compat profile version: 4.5
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 3.2


My current challenge is to get vulkan working since the proton compatibility tool (and other native games like Rise Of The Tomb Raider) depends on it. Searching a bit more after last night, it seems that "radv" is the radeonsi vulkan implementation that should be in mesa, and I've seen a report at Phoronix of mesa 20.0 outperforming the closed-source amdgpu-pro driver in recent vulkan testing (https://www.phoronix.com/scan.php?page=article&item=mesa20radv-aco-amdvlk&num=1). I don't see a release for version 20 of mesa, even at GitHub (https://github.com/mesa3d/mesa/releases): latest there is 19.3.2 -- same version I currently have installed, so this is leading me to believe that either I should wait for 20.0 to drop or give mesa-9999 a go. I'd really appreciate input on this -- I'm not sure if I'm on the right track, really, mostly guessing.
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davydm
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Joined: 06 Jan 2017
Posts: 53

PostPosted: Tue Jan 21, 2020 3:57 am    Post subject: Reply with quote

Thanks for all the help, everyone. I haven't been sleeping properly for the last few weeks and it shows. I could have sworn I read the use flags for mesa many many times without spotting:

Code:

vulkan               : Enable Vulkan drivers


setting that on, rebuilding mesa & rebooting to ensure it's correctly loaded and vulkaninfo is happy with me:

Code:

Vulkan Instance Version: 1.1.125


and Hellblade starts up fine.

Thanks again for all the help.
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