Root cause of the ACCESS_LOST (0x887A0026) churn + context-change freeze, found
live: the box is a HYBRID system (RTX 4090 + AMD Radeon iGPU + SudoVDA). DXGI does
hybrid GPU-preference resolution and REPARENTS the SudoVDA output between adapters
(SET_RENDER_ADAPTER is ignored — the IDD lands on the iGPU 0x23664 while we
duplicate on the 4090 0x15768), which constantly invalidates Desktop Duplication.
Apollo runs fine on this same box because it hooks this away.
Port Apollo's hook: replace win32u.dll!NtGdiDdDDIGetCachedHybridQueryValue to always
report D3DKMT_GPU_PREFERENCE_STATE_UNSPECIFIED, so DXGI skips preference resolution
and never reparents the output → DDA stays on one adapter. Installed once before the
first DXGI factory/enumeration (DuplCapturer::open). We fully replace the function
(never call the original) so a 12-byte absolute-jmp prologue patch suffices — no
detour crate / C length-disassembler dependency, just VirtualProtect.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
enricobuehler
a01f8a2f58