Intel GPU (i915/Xe) Engine Hangs and GuC Firmware Failures

On Intel data-center GPUs, engine hangs surface as i915 "GPU HANG"/engine-reset dmesg lines and GuC (scheduling microcontroller) load or crash messages. Compute contexts die on reset; repeated hangs indicate firmware/kernel pairing problems more often than silicon.

Quick answer

On Intel data-center GPUs, engine hangs surface as i915 "GPU HANG"/engine-reset dmesg lines and GuC (scheduling microcontroller) load or crash messages.

Hardware#intel-gpu#i915#guc#xe#gpu-hang#firmware

What this failure is

Intel GPU (i915/Xe) Engine Hangs and GuC Firmware Failures is a Hardware failure seen during ML training runs. On Intel data-center GPUs, engine hangs surface as i915 "GPU HANG"/engine-reset dmesg lines and GuC (scheduling microcontroller) load or crash messages. Compute contexts die on reset; repeated hangs indicate firmware/kernel pairing problems more often than silicon. Common tags: Intel Gpu, I915, Guc, Xe.

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Why it happens (the mechanism)

Kernel i915/Xe driver vs GuC firmware version mismatch. Long-running compute kernels tripping heartbeat (preempt timeout) defaults. Genuine hardware fault when isolated to one card across stacks. Taken together, these mechanisms explain why the failure is reproducible, why it tends to surface on specific workloads or scales, and why generic mitigation attempts often fall short without addressing the underlying cause.

What you'll observe

[drm] GPU HANG ecode ... in dmesg; workloads die mid-kernel
GuC initialization failed / firmware load errors at boot
Level Zero apps report device lost after resets

Common symptoms and what they mean

Symptom	Why it happens
i915 Resetting rcs/ccs for hang	kernel i915/Xe driver vs GuC firmware version mismatch
/sys/class/drm/cardN/error populated	long-running compute kernels tripping heartbeat (preempt timeout) defaults
hang recurrence tied to specific kernel+firmware combos	genuine hardware fault when isolated to one card across stacks

Which systems are affected

Intel Max/Flex GPUs
oneAPI/Level Zero and SYCL workloads
IPEX training stacks

How to confirm this is the problem

Use this checklist to test the hypothesis against a small reproduction. No single line proves the root cause, so preserve the preceding events and compare one variable at a time.

✓Reproduce the failure from a clean checkpoint/seed: the symptom must appear without warm-up state from a previous run.
✓Verified signal present: i915 Resetting rcs/ccs for hang
✓Verified signal present: /sys/class/drm/cardN/error populated
✓Verified signal present: hang recurrence tied to specific kernel+firmware combos
✓A targeted fix from the "How to fix it" section eliminates or substantially reduces the symptom within one validation pass.

The fix and the prevention pattern

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Related failures to investigate next

Gpu Memory Clock Throttle often co-occurs with this failure because both share underlying assumptions about hardware; if you fix this entry but still see drift, validate the related primary cause next. gpu memory clock throttle →

Cuda Illegal Instruction often co-occurs with this failure because both share underlying assumptions about hardware; if you fix this entry but still see drift, validate the related neighboring cause next. cuda illegal instruction →

Nvlink Partial Vs Nvswitch often co-occurs with this failure because both share underlying assumptions about hardware; if you fix this entry but still see drift, validate the related neighboring cause next. nvlink partial vs nvswitch →

Root cause

kernel i915/Xe driver vs GuC firmware version mismatch
long-running compute kernels tripping heartbeat (preempt timeout) defaults
genuine hardware fault when isolated to one card across stacks

The fix and how to prevent it

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References

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Related Hardware errors

GPU Memory Clock Throttle

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NVLink Error

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GPU Thermal Throttling

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GPU Power Cap Reached

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