Data structure that displays send to sources to communicate their supported resolutions, refresh rates, and audio capabilities.
Key points:
- Every HDMI/DP handshake involves EDID exchange
- EDID issues are the #1 cause of "no signal" problems in AV systems
- Switchers and matrix systems often need EDID management (emulation or passthrough)
- Tools like Extron EDID Manager or built-in matrix EDID tables help resolve issues
- Common fix: Force a specific EDID profile rather than relying on passthrough