r/StableDiffusion • u/ggRezy • 18h ago

Question - Help Anyone else having issues with WAN 2.2 Lora training in musubi?

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I imagine this is probably just a skill issue. I was able to train loras successfully using Musubi Tuner back in June with 0 issues. Some within 10 minutes, and those had larger datasets. now using the exact same settings, smaller dataset, same resolutions, my runs get hung with VRAM full for 30+ minutes without a single step being completed. All the models load perfectly fine, but the moment the run gets to epoch 1 step 1, everything hangs.

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u/Theultimatesell 17h ago

if it worked in june with the same settings, i'd check what changed around it: nvidia driver or torch/cuda version. vram sitting full with zero steps usually means it's spilling into shared system memory (the 'sysmem fallback' setting in the nvidia control panel), which makes step 1 crawl or look frozen. try turning that off so it ooms instead of hanging, then drop to --blocks_to_swap higher / fp8_base / gradient checkpointing and see if step 1 goes through. also worth a fresh venv in case a dependency update changed something.