On a Dynamic Refresh Rate display (e.g. Surface 120Hz panels), stopping
playback with Match Refresh Rate enabled left Windows pinned to a fixed
60Hz with DRR disabled: the legacy EnumDisplaySettingsW capture only sees
the DRR base rate, and a DEVMODE ChangeDisplaySettingsExW restore cannot
express the CCD-level DISPLAYCONFIG_PATH_BOOST_REFRESH_RATE selection.
Capture a virtual-refresh-rate-aware QueryDisplayConfig snapshot of the
topology before the first display mutation and restore it through
SetDisplayConfig (saving to the database to repair the 24/48/60Hz
registry-workaround write-back), keeping the DEVMODE path as fallback.
The HDR toggle mode dances re-apply the same kind of snapshot, and crash
recovery returns to the persisted display configuration via
SDC_USE_DATABASE_CURRENT, verified against the recorded mode before the
legacy restore takes over.
close#2055
HDR state was recorded for the display playback started on, but the restore gate queried whichever monitor the window sat on at exit; moving the window to another monitor could skip the restore, clear the change flag, and delete the recovery record, leaving the original display stuck in HDR. The gate and any repeat toggle now resolve the recorded target.
A repeat SetHDREnabled issued after the window moved also stayed pinned to the recorded display: playback moved from HDR monitor A to monitor B re-toggled A, returned success, and left B untouched even though the Dart caller had probed B. With a change live, the operation now restores the recorded display first (retiring its recovery record exactly as a normal restore) and proceeds as a fresh change on the current monitor. If that restore fails the call refuses and keeps the old record so no display diverges from its recovery state; if the current monitor cannot be determined it stays pinned to the recorded display.
edde746