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[idd] helper: fix dependency cycle issue on windows 10

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This commit is contained in:
Geoffrey McRae
2026-07-19 00:14:40 +10:00
parent a700db51a0
commit e0d3794c1d
1 changed files with 7 additions and 2 deletions
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9
idd/LGIddHelper/CPipeClient.cpp
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@@ -337,9 +337,14 @@ bool CPipeClient::EnsureOnlyDisplayLocked()
path.targetInfo.modeInfoIdx = 1; path.targetInfo.modeInfoIdx = 1;
path.flags |= DISPLAYCONFIG_PATH_ACTIVE; path.flags |= DISPLAYCONFIG_PATH_ACTIVE;
// Keep a bootable physical-display topology in the persistence
// database. Persisting an LG-only topology creates a dependency cycle
// on Windows 10 at the next boot: IddCx waits for display topology
// initialization while the saved topology waits for this IDD adapter.
// The helper reapplies this temporary topology on startup, display
// changes and periodically, so it remains enforced for the session.
result = SetDisplayConfig(1, &path, 2, selectedModes, result = SetDisplayConfig(1, &path, 2, selectedModes,
SDC_APPLY | SDC_USE_SUPPLIED_DISPLAY_CONFIG | SDC_APPLY | SDC_USE_SUPPLIED_DISPLAY_CONFIG | SDC_ALLOW_CHANGES);
SDC_ALLOW_CHANGES | SDC_SAVE_TO_DATABASE);
if (result != ERROR_SUCCESS) if (result != ERROR_SUCCESS)
{ {
DEBUG_ERROR("Failed to apply the LG-only display topology (%ld)", DEBUG_ERROR("Failed to apply the LG-only display topology (%ld)",