Bernardo Magri
e4404e0162
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The last unproven half of bec826b, and it needed a keyboard that stays behind
when the dock leaves. The dev box's by-tech hangs off the BenQ's own hub, so
it always walked away with the cable — a Logitech K400 with its receiver in
the laptop is the real case, and Bernardo happened to plug one in.
Both halves measured on hardware (dev box, 2026-07-14):
- PRIMARY: across a real unplug + the fixed transition, the K400 kept its
remembered `us`. Panel back, layout intact.
- CONTROL: a bare `hyprctl reload` with no restore took the same board from
`us` to the session's `gb`.
The control matters more than the pass. That reload clobbers runtime
`device[<name>]:kb_layout` was an inference from the mechanism when
restore_keyboards was written — reasonable, but unmeasured, and this session
has already shown what unmeasured reasoning about this watcher is worth.
It holds: without that call the undock's escalation would have silently
broken the layout of every keyboard that outlives the cable, trading a black
panel for a keyboard that types the wrong characters at the password prompt.
Verified V2 again after the comment/doc edits: nix flake check --no-build,
checks.docking-ux, shellcheck clean.
Round 8 now asks only for what is still open: relogin (the watcher calls the
transition by baked store path, so exec-once means it runs the old build
until then) and repetition — 5+ unplugs, one with the lid shut.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>