forked from unom/punktfunk
enricobuehlerandClaude Fable 5
c8fdef8bd1
The identity policy promised per-client scaling, but on GNOME it could never work through the DE: Mutter mints a fresh EDID serial (0x%.6x, a per-shell counter) for every RecordVirtual monitor and offers no way to pass a stable identity, so the monitors.xml entry GNOME writes when the user sets a scale never rematches on reconnect — and our own topology ApplyMonitorsConfig then clobbered whatever was left back to a hardcoded scale 1.0. The host now remembers the scale itself (<config>/display-scale.json, keyed by the identity key — fp / fp@WxH / "shared" per the policy): reapplied at connect via the RecordVirtual mode's preferred-scale (Mutter pre-validates it; older Mutter ignores the key) and preserved — not forced — by the topology apply, with an integral-logical-size snap + retry-at-derived fallback (GetCurrentState reports no supported-scales for virtual monitors to snap to). The user's mid-session changes are polled from DisplayConfig every 5 s and written back, so a host crash loses at most a few seconds; an unconfirmed "Keep Changes" revert is tracked faithfully too. Mutter also now resolves the identity slot (set_client_identity/last_identity_slot) like KWin, keying the registry's group arrangement and /display/state. Verified live on the GNOME 50 box: set 1.5 mid-stream → persisted under the client fp; full teardown (fresh serial 0x000018); reconnect → monitor up at 1.5, "reapplying the client's saved display scale" logged. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>