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rob thijssen 1423366f30
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docs: the missing firmware is sourceable, not lost
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
2026-07-28 06:58:29 +03:00
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