{"record":{"id":"79afd0b8672ae0c2","repo":"vllm-project/vllm","slug":"failed-to-infer-device-type-please-set-the-enviro","errorCode":null,"errorMessage":"Failed to infer device type, please set the environment variable `VLLM_LOGGING_LEVEL=DEBUG` to turn on verbose logging to help debug the issue.","messagePattern":"Failed to infer device type, please set the environment variable `VLLM_LOGGING_LEVEL=DEBUG` to turn on verbose logging to help debug the issue\\.","errorType":"validation","errorClass":"RuntimeError","httpStatus":null,"severity":"error","filePath":"vllm/config/device.py","lineNumber":56,"sourceCode":"        graph from input ids/embeddings to the final hidden states,\n        excluding anything before input ids/embeddings and after\n        the final hidden states.\n        \"\"\"\n        # no factors to consider.\n        # the device/platform information will be summarized\n        # by torch/vllm automatically.\n        factors: list[Any] = []\n        hash_str = safe_hash(str(factors).encode(), usedforsecurity=False).hexdigest()\n        return hash_str\n\n    def __post_init__(self):\n        if self.device == \"auto\":\n            # Automated device type detection\n            from vllm.platforms import current_platform\n\n            self.device_type = current_platform.device_type\n            if not self.device_type:\n                raise RuntimeError(\n                    \"Failed to infer device type, please set \"\n                    \"the environment variable `VLLM_LOGGING_LEVEL=DEBUG` \"\n                    \"to turn on verbose logging to help debug the issue.\"\n                )\n        else:\n            # Device type is assigned explicitly\n            if isinstance(self.device, str):\n                self.device_type = self.device\n            elif isinstance(self.device, torch.device):\n                self.device_type = self.device.type\n\n        # Some platforms require processing inputs on CPU.\n        from vllm.platforms import current_platform\n\n        if (\n            current_platform.uses_host_device_handling()\n            and self.device_type == current_platform.device_type\n        ):","sourceCodeStart":38,"sourceCodeEnd":74,"githubUrl":"https://github.com/vllm-project/vllm/blob/c794754062d49a8fdb63ab3c5215b488b865030c/vllm/config/device.py#L38-L74","documentation":"Error \"Failed to infer device type, please set the environment variable `VLLM_LOGGING_LEVEL=DEBUG` to turn on verbose logging to help debug the issue.\" thrown in vllm-project/vllm.","triggerScenarios":"Raised at vllm/config/device.py:56 when validation fails: Failed to infer device type. Typically triggered by an incompatible or incomplete vLLM configuration, an unsupported platform/backend combination, or a runtime resource/dependency that is missing.","commonSituations":"Commonly encountered at vllm/config/device.py:56 during vLLM startup/config validation or runtime setup when: (1) conflicting CLI flags or config fields are combined, (2) the current platform (CUDA/ROCm/CPU/XPU) or installed optional packages do not support the requested feature, or (3) a required value is absent or out of range. Resolve by correcting the configuration as described in the message, or by selecting a supported alternative.","solutions":["Set VLLM_LOGGING_LEVEL=DEBUG and rerun to see why device type detection failed.","Explicitly select the device (e.g. --device cuda) or ensure the required platform drivers are installed."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"c794754062d49a8fdb63ab3c5215b488b865030c","analyzedAt":"2026-08-14T21:17:39.825Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}