Vulkan backends bundled their own loader and ICD manifests but neither the
Mesa driver the manifests point at nor a way to make the loader find them,
so on a runtime base image without Mesa the loader enumerated zero devices
and the GPU silently fell back to CPU (only NVIDIA worked, since its ICD is
injected by the container toolkit).
- scripts/build/package-gpu-libs.sh: for each installed ICD manifest, bundle
the driver .so its library_path names — no hard-coded, platform-dependent
soname list — plus that driver's ldd dependencies, skipping manifests whose
driver isn't installed. Rewrite each library_path to a bare soname so the
bundled driver resolves via the LD_LIBRARY_PATH run.sh already sets.
- .docker/install-base-deps.sh, backend/Dockerfile.golang,
backend/Dockerfile.python: install mesa-vulkan-drivers in every Vulkan
builder so the driver + manifests exist to be packaged (the LunarG SDK
ships only the loader and shader tooling).
- pkg/model/process.go: when a backend ships vulkan/icd.d/, point the loader
at it via VK_DRIVER_FILES/VK_ICD_FILENAMES at launch (no-op otherwise).
Covered by pkg/model/process_vulkan_test.go.
- backend/go/parakeet-cpp/package.sh: complete the L0 stub (was missing the
libc-family ldd walk + GPU-lib packaging) by mirroring whisper, so the
vulkan-parakeet image actually bundles its GPU runtime.
Assisted-by: Claude Code:claude-opus-4-8
Signed-off-by: Richard Palethorpe <io@richiejp.com>
