fix(onboard): name the failed GPU trust-gate check in preflight - #9052
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When the GPU trust gate rejected an nvidia-smi report, preflight printed only the bare "no GPU detected", which points the user at hardware and drivers that can be working. The check that actually failed — an absent /proc/driver/nvidia interface, an unattempted proof on multiple GPU rows, an unavailable prover, or a failed bounded CUDA workload — was known at rejection time and then discarded. detectGpu() now reports the rejecting check through an injected onTrustGateRejection callback. The reason is fixed text only and never echoes nvidia-smi output, which is untrusted. The readiness-gated runtime preflight carries the reason from the newest detection on its result, and onboard preflight prints it under the existing "Local NIM unavailable — no GPU detected" line. Closes #9000 Signed-off-by: Dongni Yang <dongniy@nvidia.com>
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📝 WalkthroughWalkthroughGPU detection now reports fixed trust-gate rejection reasons. Runtime preflight carries those reasons through proof and host-refresh phases. Onboarding renders the reason beneath the no-GPU diagnostic. Tests cover rejection, propagation, rendering, and success paths. ChangesGPU trust-gate reporting
Estimated code review effort: 3 (Moderate) | ~20 minutes Mergeability Score: ⚪ Minimal · up to This localized change only improves the explanation shown when GPU trust checks fail; targeted behavior tests, type checking, and documentation validation passed, and no actionable merge-blocking risk remains. Sequence Diagram(s)sequenceDiagram
participant detectGpu
participant fatalRuntimePreflight
participant printGpuPreflightLines
participant onboard
detectGpu->>fatalRuntimePreflight: return GPU and rejection reason
fatalRuntimePreflight->>fatalRuntimePreflight: preserve proof-phase reason
fatalRuntimePreflight-->>onboard: return preflight result
onboard->>printGpuPreflightLines: pass GPU and rejection reason
printGpuPreflightLines-->>onboard: render preflight messages
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✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Code Coverage OverviewLanguages: TypeScript TypeScript / code-coverage/pluginThe overall coverage in commit 949a5e2 in the TypeScript / code-coverage/cliThe overall coverage in commit 949a5e2 in the Show a code coverage summary of the most impacted files.
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Actionable comments posted: 2
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Inline comments:
In `@src/lib/inference/nim.gpu-proof-plausible-name.test.ts`:
- Around line 230-245: Update the tests for unrecognized GPU names and multiple
GPU rows around detectGpu to use a locally tracked or spy prover, then assert it
was not invoked in each rejection case while preserving the existing reason
assertions.
In `@src/lib/inference/nim.ts`:
- Around line 112-116: Update the names-only unified-memory fallback in the
relevant inference flow to invoke onTrustGateRejection with fixed,
non-probe-derived text immediately before returning null for denylisted GPU
names. Preserve the existing fallback behavior and add a regression test
covering an unavailable memory query with a successful names-only query.
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…oard.ts The names-only unified-memory fallback rejected denylisted placeholder names without reporting a trust-gate rejection reason, so a host whose memory query fails still saw the bare "no GPU detected". The fallback now reports the same fixed-text reason. Move the preflight GPU and sandbox-GPU display block from onboard.ts into preflight-messages.ts, which exists for exactly this entrypoint-extraction purpose, so onboard.ts shrinks by 24 lines (codebase growth guardrail). The rejection-reason tests now also assert the prover is never invoked on paths that must not start the bounded CUDA proof. Refs #9000 Signed-off-by: Dongni Yang <dongniy@nvidia.com>
The comment omitted the names-only fallback's tagged-name trust-tier rejection, which records no reason. State both silent filters so the contract matches the code. Refs #9000 Signed-off-by: Dongni Yang <dongniy@nvidia.com>
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Security review: PASS.
No security findings remain. |
Signed-off-by: Carlos Villela <cvillela@nvidia.com>
Signed-off-by: Carlos Villela <cvillela@nvidia.com>
Signed-off-by: Carlos Villela <cvillela@nvidia.com>
prekshivyas
approved these changes
Aug 14, 2026
wscurran
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area: inference
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Summary
When the GPU trust gate rejected an
nvidia-smireport, preflight printed only the bare "no GPU detected", which points the user at hardware and drivers that can be working. Preflight now names the check that failed — for example an absent/proc/driver/nvidiainterface or a failed bounded CUDA proof — under the existingLocal NIM unavailable — no GPU detectedline. This resolves the remaining ask of #9000; PR #9008 resolved the primary ask.Related Issue
Closes #9000
Changes
src/lib/inference/nim.ts:detectGpu()reports the rejecting trust-gate check through a new optionalonTrustGateRejectioncallback inDetectGpuDeps. Reasons are fixed text only and never echonvidia-smioutput, which is untrusted.passesBoundedCudaProof()becomesboundedCudaProofRejection()so the proof outcome (not attempted for multiple rows, not attempted with no prover, failed) names itself. Callers that do not pass the callback are unchanged.src/lib/onboard/fatal-runtime-preflight.ts: the readiness-gated runtime preflight captures the reason from the newest detection (observation phase or runtime proof phase) and carries it on the result as optionalgpuTrustGateRejection. The proof-phase detection replaces the observation-phase reason, and a passing proof clears it.src/lib/onboard/preflight-messages.tsand its test: the extracted GPU renderer prints the reason under theno GPU detectedline.src/lib/onboard.tsuses that renderer.src/lib/inference/nim.gpu-proof-plausible-name.test.ts: nine tests covering each reason, proof ordering, and the no-reason-on-success contract.src/lib/onboard/fatal-runtime-preflight.test.ts: three tests covering reason propagation for a failed runtime proof, the observation-only path, and a passing proof.docs/reference/troubleshooting.mdx: one sentence documenting the printed failed check.The callback is a new seam on an existing dependency object; its consumer is the readiness-gated runtime preflight and the contract is protected by the 18 tests above.
Type of Change
Quality Gates
Documentation Writer Review
docs-updated84fa954831through merge commit949a5e236b, includingdocs/reference/troubleshooting.mdx, every changed user-visible message and code comment, and all 18 added tests. The main merge preserved every fixed GPU trust-gate diagnostic and its rendering below the no-GPU summary. The focused inference diagnostic and preflight-message suites passed after the merge. The fatal runtime preflight file retained eight host-profile fixture failures on this ARM64 DGX Spark without the fixture GPU, while its other 17 tests passed. No documentation or writing findings remain.Verification
Signed-off-by:line and every commit appears asVerifiedin GitHubpre-commit,commit-msg, andpre-pushhooks passed, ornpm run validate:prpassed after refreshingorigin/mainwhen hooks were skipped or unavailablenpx vitest run src/lib/inference/nim.gpu-proof-plausible-name.test.ts src/lib/inference/nim.test.ts src/lib/onboard/fatal-runtime-preflight.test.ts— 3 files, 132 tests passed;npm run typecheck:cliclean; the new tests were red before the change (rejection reasons never emitted, result field absent)npm testfor broad runtime/test-harness changes;npm run checkfor repo-wide validation/coverage changes — command/result:npm run docsbuilds without warnings (doc changes only)Signed-off-by: Dongni Yang dongniy@nvidia.com
Summary by CodeRabbit
New Features
Documentation
Tests