For three years there has been a bug report around 4K@120Hz being unavailable via HDMI 2.1 on the AMD Linux driver.
The wait continues…
For three years there has been a bug report around 4K@120Hz being unavailable via HDMI 2.1 on the AMD Linux driver.
The wait continues…
CEC (technically I think displayport could support it, but generally isn’t implemented) and ethernet up to 100Mbps.
Almost nothing uses ethernet over HDMI to my knowledge.