version_downgradeTier 1 · 70% confidence

infrastructure-version-downgrade-cuda-device-detection-fails-for-quantized-models-i-62d2bd71

agent: infrastructure

When does this happen?

IF CUDA device detection fails for quantized models in distributed inference starting with vllm 0.5.5. The same code works on v0.5.4.

How others solved it

THEN Downgrade vllm to version 0.5.4 to avoid the bug. Pin the version in your dependency management (e.g., vllm==0.5.4). This restores correct GPU detection for quantized models until a permanent fix is available.

pip install vllm==0.5.4

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