vulkaninfo inside the engine's own base image (ubuntu:24.04 + mesa-vulkan-drivers
vulkan-tools, --device /dev/dri, rootless) reports Radeon 8060S Graphics (RADV
GFX1151) / driver radv / API 1.4.318 with two heaps: heap 0 host-visible 38.67 GiB
(budget 32.58) and heap 1 DEVICE_LOCAL 77.33 GiB (budget 65.16) with frank-dragoon
loaded. ggml's Vulkan backend asks for DEVICE_LOCAL, so the ~4 GiB the TTS engine
needs lands in the 65 GiB budget: memory is not the constraint, and the 2 GiB DRM
carve-out never enters the picture. Both heaps are GTT — the same host RAM, so the
budget is a ceiling on mappings, not free silicon memory.
Traps recorded: vulkaninfo --batch is not a flag in Ubuntu 24.04's vulkan-tools
(prints help, exits 1; use --text), and the container has no NVIDIA ICD, so Vulkan
device 0 happens to be the iGPU — select by name, not index.
Probe: /home/dank/spikes/npu-tts/vk_probe.sh on Dankclaw. Enumeration only; no
allocation, no compute, production untouched.
Frank
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