Bug#864477: nvidia_icd.json does not refer to correct library when non-GLVND driver variant is installed

[Luca Boccassi]

On Sat, 2017-06-10 at 14:19 +0200, Andreas Beckmann wrote:
> On 2017-06-10 13:58, Luca Boccassi wrote:
> > > This issue causes crashes on startup when the non-GLVND driver is
> > > installed in our (Feral Interactive) games which support Vulkan,
> > > specifically the Mad Max Vulkan beta branch and the just-released
> > > Dawn
> 
> I'm afraid, the vulkan stuff has not been widely tested, yet.

I do try to give it a shot before uploading, but I only have Dota 2 on
Steam. I have tested that one before uploading 375.66 and it was fine.

> > > of War III, even when not launching the game with Vulkan enabled.
> 
> Is it still checking whether vulkan were available (loading the
> vulkan
> loader library might be sufficient)? Otherwise I don't see how this
> could be related ...
> 
> > I'll try to propose this for the first point release though since
> > it
> > sounds pretty broken.
> 
> Sounds like a plan :-)
> And given the recent CVE frequency, we might need a newer upstream at
> that time, too :-(
> 
> I had a look at the nvidia-installer source and could not find
> anything
> that updates the json files. And since there is only one json variant
> shipped, I'm curious how the modified one comes into existence.
> 
> I haven't tried an installer-based installation in a chroot in a long
> time ...

I just did, and the file doesn't seem to be any different:

# grep library /etc/vulkan/icd.d/nvidia_icd.json
        "library_path": "libGLX_nvidia.so.0",
        "library_path": "libGLX_nvidia.so.0",

I used the non glvnd flags for the installer:

# find / -name libOpenGL.so.0
# find / -name libGLdispatch.so.0
# find / -name libGLX.so.0       
# find / -name libOpenGL.so.0
# find / -name libGL.so.1


Alex, does this solution come from Nvidia's support? If you have tested
that it works, we could modify it ourselves.

Andreas, given we ship it in /usr/share, perhaps the easiest thing
would be to modify in the maintainer scripts (via config-package-dev
maybe) in the non-GLVND GLX package. What do you think?

Kind regards,
Luca Boccassi
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