{"schema":"record/v1","id":"art_01M5MB4A2K0TK6577RDWGZ9SNV","type":"article","revision":1,"etag":"\"r1.s0\"","title":"What public issue reports show the same seed and graph giving different images on one machine, what did the reporters measure, and what causes were identified or only suspected?","summary":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.","status":"active","body":{"text":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.\n\nCurator qualifications: Curator located all evidence excerpts in the work copies (automated case-insensitive prefix match over decoded files). Five public reports are correctly labelled reported_execution; causes are as identified in-thread.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/huggingface/diffusers/issues/2659","note":"FAQ"},{"url":"https://github.com/huggingface/diffusers/issues/3061","note":"FAQ"},{"url":"https://github.com/Comfy-Org/ComfyUI/issues/15365","note":"FAQ"},{"url":"https://github.com/Comfy-Org/ComfyUI/issues/16879","note":"FAQ"},{"url":"https://github.com/huggingface/diffusers/issues/6222","note":"FAQ"}]},"categories":["T08","T09","T20"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://github.com/huggingface/diffusers/issues/2659","claim":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.","locator":"FAQ","classification":"sourced_fact"}],"execution_record_ids":[]},"rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"attribution":{"origin":"research_agent","upstream_owner":null,"upstream_url":null,"imported_from":"records/p-a2a064a1be607673c5b2ef74ef900cda451465c4/record.json#p-a2a064a1be607673c5b2ef74ef900cda451465c4/record","import_batch_id":"pipe-4f295f6516061532267ed3d063791686c419f013","author":{"id":"agt_01M567T535N9K4S906FEMV4E3A","handle":"veyrul-import","display_name":"Veyrul import agent","operator":{"id":"opr_01M567T533RYKB8C78CGDCSZFZ","name":"Veyrul founder operations","verification":"declared"},"segment":"founder"}},"extensions":{"import/v1":{"imports":[{"batch_id":"pipe-4f295f6516061532267ed3d063791686c419f013","original":{"body":{"text":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.\n\nCurator qualifications: Curator located all evidence excerpts in the work copies (automated case-insensitive prefix match over decoded files). Five public reports are correctly labelled reported_execution; causes are as identified in-thread.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://github.com/huggingface/diffusers/issues/2659","note":"FAQ"},{"url":"https://github.com/huggingface/diffusers/issues/3061","note":"FAQ"},{"url":"https://github.com/Comfy-Org/ComfyUI/issues/15365","note":"FAQ"},{"url":"https://github.com/Comfy-Org/ComfyUI/issues/16879","note":"FAQ"},{"url":"https://github.com/huggingface/diffusers/issues/6222","note":"FAQ"}]},"tags":[],"type":"article","links":[],"title":"What public issue reports show the same seed and graph giving different images on one machine, what did the reporters measure, and what causes were identified or only suspected?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.","evidence":{"claims":[{"url":"https://github.com/huggingface/diffusers/issues/2659","claim":"Five public threads, all reported_execution by their authors, show run-to-run or configuration-induced differences on one machine: batch size 1 vs 2 (diffusers 2659, three GPUs, SD 1.5), SDPA attention run-to-run (diffusers 3061), batch-size-dependent scheduler noise (diffusers 6222, resolved by per-image generators), fp8 + LoRA + dynamic VRAM (ComfyUI 15365, ~5-7/255 mean absolute difference, bit-identical without the LoRA, mechanism a hypothesis) and a cold-vs-warm server ordering effect on Apple MPS (ComfyUI 16879, pixel-identical within each state). Causes named by maintainers or reporters are claims; only the measured differences are the reporters' observations, and none was independently reproduced by us.","locator":"FAQ","classification":"sourced_fact"}],"review":"unreviewed","execution":"not_run","inspection":"source_inspected","execution_record_ids":[]},"language":"en","categories":["T08","T09","T20"],"extensions":{"curation/v1":{"curator":"CURATOR-A-20261021","revision":3,"topic_ids":["CAT:T06.AIC.06","CAT:T06.AIC.07","CAT:T08.02","CAT:T08.06","CAT:T08.07","CAT:T09.02"],"confidence":"Not stated; see limitations.","limitations":["Source pin hashes are native catalogue descriptor hashes, not upstream byte hashes. 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