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waydabber / m1ddc

This little tool controls external displays (connected via USB-C/DisplayPort Alt Mode) using DDC/CI on Apple Silicon Macs. Useful to embed in various scripts.

Repository from Github https://github.comwaydabber/m1ddcRepository from Github https://github.comwaydabber/m1ddc

macMini m2 HDMI different address

scr34m opened this issue · comments

commented

My DELL U2715H is connected over HDMI and i had to change the address 0x37 to 0xB7, with this tweak is now able to read data.

commented

Hi there - this affects only m1 and entry level m2 Macs, not a HDMI specific issue but related to the HDMI converter chip found in these specific models. BetterDisplay has this built-in, you can use BetterDisplay's CLI to use DDC control. Newer Macs (M2 Pro, M3) do not have this issue and likely future Macs won't either.