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ERROR_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA
CGMS-A conveys copy-control information in an analog television signal
ERROR_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA is specific to Copy Generation Management System—Analog. CGMS-A carries copy-control state in television signaling; support depends on the analog output standard and the display driver's ability to insert the required data, not simply on whether the monitor can display the picture.
Query supported protection types and the available television protection standards on the same physical output. Record the selected signal format, because PAL WSS and NTSC vertical-blanking signaling use different fields. A digital connector may support HDCP while correctly rejecting CGMS-A. Applications should map the content policy to the actual connector rather than treating all output-protection flags as equivalent substitutes.
Signal-path information to collect
- Analog or digital connector type and current output format.
- CGMS-A support bit and available TV protection standards.
- Aspect-ratio signaling values sent with the command.
- Any converter that changes the analog television standard.
References
- Microsoft: CGMS-A and WSS/VBI signaling parameters
- Microsoft: distinct OPM protection mechanisms
- Microsoft: querying signaling and output state
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