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For hyperstack infrastructure and model engineering teams

Hyperstack Docker cannot select a GPU driver: container runtime or CUDA?

Compare the chosen image, Docker runtime and first container error. A container that cannot request a GPU is different from a model that starts and then fails.

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Replay a resolved Hyperstack workflow incident

Upload your log file. Review the selected evidence and masking, then run diagnosis. Keep the original log for any follow-up questions.

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Up to 50 diagnoses a day for 30 days. Verify your work email to activate an eligible company evaluation, then replay a resolved incident and compare the evidence and next steps with your team's confirmed cause.

Use your company email (e.g. alex@yourcompany.com). Eligible company domains can activate a free 30-day Team evaluation (up to 50 diagnoses/day) after email and domain checks, regardless of mail host. Uncertain domains can request review from support@denpex.com. Free local diagnoses remain available without an account.

What a useful evaluation should establish

Compare the first failure, quoted evidence and unresolved questions with an incident your team has already resolved. Begin with this question: Can the container runtime expose the assigned GPU? Only attribute a process, rank, device or recovery state when the submitted evidence establishes it.

Can the container runtime expose the assigned GPU?

Evidence to compare: Image revision, Docker runtime configuration and the GPU-selection error.

A missing container-runtime capability occurs before model execution. Do not diagnose model memory usage from a container that never acquired GPU access.

Does the application fail after startup?

Evidence to compare: The first worker initialization result and subsequent CUDA exception.

If the runtime boundary is healthy, the application needs its own evidence. Keep those phases separate instead of treating every CUDA-related message as the same fault.

Which configuration is supported by the provider?

Evidence to compare: The deployed base image and relevant driver/toolkit compatibility reference.

A preconfigured image establishes a supported baseline. A useful incident comparison records deviations without blindly reinstalling drivers on a shared or active workload.

Use Denpex alongside your existing telemetry tools to investigate submitted incident evidence. With monitoring configured on a supported plan, detected failures can trigger alerts and an automatic diagnosis from the captured evidence.

Inside Denpex

See the evidence, not just the claim

Follow the causal chain, inspect the quoted evidence and prepare the next handoff. These actual product captures use founder-account examples and the VS Code extension, with the source identified under each image. Open a capture to inspect it at full size.

Follow the failure through the cascade

Denpex founder-account example: a causal graph connects an Xid 48 ECC event to a rank exit and downstream collective failures, with quoted evidence for each stage.
Live founder-account capture from the bundled NCCL/ECC example. Follow the hardware event, rank exit and downstream symptoms with a supporting log quote at each stage.Inspect original image

Prepare the hardware escalation

Denpex hardware handoff summary asks the operator to capture diagnostic evidence and verify RMA eligibility with the vendor.
Actual hardware handoff summary from the same founder-account example. Capture diagnostic evidence before an approved reset, then confirm RMA eligibility with the vendor.Inspect original image

Ask for the evidence that is missing

Denpex historical example says a collective timeout does not establish the initiating rank, cause or failure domain and requests distinguishing evidence before a remedy.
Founder-account example restored from history. The original timeout remains unattributed, and the UI keeps the missing-evidence assessment visible.Inspect original image

Keep the investigation in the editor

Denpex VS Code extension displaying a bundled OOM-before-NCCL example, matched log evidence, verification guidance and an investigation handoff.
Actual VS Code extension capture of the bundled OOM-before-NCCL example. Review matched log evidence, verification guidance and the investigation handoff without leaving the editor.Inspect original image