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...

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[–] 9 points 2 years ago (1 child)

CEC (technically I think displayport could support it, but generally isn't implemented) and ethernet up to 100Mbps.

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  • [–] 15 points 2 years ago (1 child)

    Almost nothing uses ethernet over HDMI to my knowledge.

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  • [–] 7 points 2 years ago (2 children)

    This is the first time I heard of Ethernet over HDMI and I can't tell if you're joking.

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  • [+] 3 points 2 years ago* (last edited 2 years ago) (2 children)