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docs: rule out the RF clocks and unclaimed rails, and question the premise
The RPMh CXO buffers that clock the transceivers were the best remaining
host-side theory — rf_clk1 and rf_clk3 have no consumer in the C630 tree and
zero enable votes from Linux, and a transceiver with no reference clock fails
exactly the way this one does. Voting all six on changes nothing. Unclaimed
regulators are out too, and the DSDT has no WWAN enable line to assert.

Also worth recording: aarch64-laptops' published device tree, the basis for
believing onboard WiFi once worked here, marks wifi@18800000 disabled and has
no modem node at all. Their WiFi instructions are headed UNSTABLE. The
regression premise may be wrong, and bracketing cannot test it anyway — neither
a hand-built 5.10 nor Fedora's own 6.1.18 reaches userspace on this machine.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011XgGF5wfxLDAybVnNz6eNQ
2026-07-28 14:38:31 +03:00
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