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The Windows backups never turned up, which looked terminal. It is not, because these blobs are signed per model rather than per machine — a copy from any other Yoga C630 works. The evidence is in linux-firmware itself, which already ships the exact analogous set for the ThinkPad X13s under qcom/sc8280xp/LENOVO/21BX: the zap shader, ADSP, CDSP, SLPI and venus firmware, one copy serving every unit of that model. So redistribution is a licensing question rather than a technical one, and qcom/sdm850/LENOVO/81JL/ has simply never been contributed. It will not arrive in a linux-firmware update. Record two routes: Lenovo's Digital Download Recovery Service, which builds a Windows recovery image against a machine's serial for its owner and carries the whole DriverStore; and other C630 owners, where these have circulated before. Reconcile two earlier claims that this contradicts — that nobody can redistribute them, and that a backup or surviving Windows partition were the only routes. Both were wrong in the same way: they described this machine's situation as though it were a property of the files. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XWRjNJMistCy6ngXH5aJLS