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| MF_E_HDCP_AUTHENTICATION_FAILURE | MF_E_CLOCK_INVALID_CONTINUITY_KEY |
MF_E_HDCP_LINK_FAILURE
MF_E_HDCP_LINK_FAILURE identifies a runtime HDCP link failure after the protected link has already been established. The timing is the key distinction: authentication succeeded earlier, so diagnostics should focus on changes to an active output path rather than only initial receiver capability.
Correlate the failure with link and display topology changes
- Record when protected playback started and the first HDCP failure timestamp; compare it with hot-plug, display mode, dock, receiver, or monitor power events.
- Capture OPM status and actual protection level before and after the failure when available.
- Log changes in the repeater/display chain and graphics-driver device state instead of reducing the event to a generic playback error.
HDCP 2.2 performs an ongoing link-integrity check after session-key exchange and encryption have started. The receiver can request re-authentication when cipher synchronization is lost, and topology changes can also force authenticated state transitions. That makes this HRESULT materially different from MF_E_HDCP_AUTHENTICATION_FAILURE. A link that works initially but fails after a display, repeater, or connection-state change should be investigated as an active-link integrity problem.
DCP LLC: HDCP link-integrity and re-authentication rules · Microsoft: Output Protection Manager · Microsoft: GPU-based content protection
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