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DDC/CI seems like an absolute crapshoot - I've got some 10 year old Dell monitors that don't seem to support it at all, but someone with the same monitors repor
by voltagex_ 6y ago
DDC/CI seems like an absolute crapshoot - I've got some 10 year old Dell monitors that don't seem to support it at all, but someone with the same monitors reported brightness control.
I just checked my 2019 Acer XB27HU, which reports brightness control but it doesn't seem to work - it then got stuck in Factory Test mode. It doesn't support input selection and doesn't do any kind of hotplug detection. I've never seen a monitor review mention these kind of features, either.
- bohuim 6y agoAgreed, I was also looking into DDC/CI for input switching my 2017 XB271HU, and mine works for brightness but definitely not input switching. Meanwhile my 2019 HP Z27 supports the full protocol, so I had to drop the idea
- X-Cubed 6y agoIt seems to also depend on the graphics card and possibly the monitor input used. DDC works fine from my desktop over DisplayPort from an nvidia GPU, but I can't seem to get it working from my laptop over HDMI from an Intel GPU.