How to fix for non-Apple USB-C to HDMI adapter dropouts
We have noticed on the m2 mac minis and the m2 mac studios an inconsistant issues with black screens or dropouts on hdmi outputs
the outputs are always connected to a non apple hdmi adapter.
we have tried many different adapters, cable matters being the most used version, these adapters work perfectly on older macs and pcs.
https://www.cablematters.com/pc-833-125-usb-c-to-hdmi-adapter-4k-ready.aspx
Other adapters have also been tried and have the same issues.
The issue presents itself as follows
1) a display will go black after a period if time but keep sync, almost like a HDCP issue but nothing HDCP was playing or anything was being touched on the computer.
The output will not come back until you reconnect the adapter or reboot the machine.
2) both display outputs on dongles will drop sync and come back instantly like a bad cable being stepped on.
if we swap the adapters to an apple 4k hdmi adapter the issue never happens.
we are connecting these output to various different broadcast equipment like blackmagic converters or barco e2 presentation switchers etc etc , it happens on all of them.
In all this the onboard hdmi output never glitches or drops out regardless of what its connected to.
Anyone else found an actual reason for this or is using an apple adapter the only solution?
I believe its has to do with a verification process in the dongle that is disrupting the hdcp but thats just a guess at this point.
[Re-Titled by Moderator]
Mac Studio (2022)
