Comment # 32 on bug 1222156 from Jeff Stern

(The following is just conjecture, FYI)

Indeed, following t neo's last (#31) comment, I see that Mesa 24.0 and 24.01
have both had various radeonsi fixes.

- https://docs.mesa3d.org/relnotes/24.0.0.html

- https://docs.mesa3d.org/relnotes/24.0.1.html

And, as it states at the top of each of both pages:

---------------
"Mesa 24.0.1 implements the OpenGL 4.6 API, but the version reported by
glGetString(GL_VERSION) or glGetIntegerv(GL_MAJOR_VERSION) /
glGetIntegerv(GL_MINOR_VERSION) depends on the particular driver being used.
Some drivers don’t support all the features required in OpenGL 4.6. OpenGL 4.6
is only available if requested at context creation. Compatibility contexts may
report a lower version depending on each driver.

Mesa 24.0.1 implements the Vulkan 1.3 API, but the version reported by the
apiVersion property of the VkPhysicalDeviceProperties struct depends on the
particular driver being used."
---------------

And my /guess/ is this is the issue: Probably some feature of Vulkan is not
(yet) implemented in this older radeon driver (?)