This is happening because the mainline kernels started getting built
with CONFIG_UBSAN=y.
Apparently, turning this on at build time inserts code at various points
that helps identify undefined behaviour, and even though the runtime
reporter is not on, the inserted code breaks the nvidia driver.
I
Public bug reported:
The vulkan layer file that is provided with the nvidia driver to control
which vulkan device appears as device 0 in hybrid configurations is
installed in the wrong location with the current packages, preventing it
from working.
It currently goes to: /usr/share/vulkan/icd.d/nv
It already uses gtk3. It builds in this complicated way where it can use
either gtk3 or gtk2 at runtime, but presumably you can just stop
building the gtk2 support in.
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