Has anyone ever gotten DDC/CI to work with Pascal (GTX10x0) cards over DisplayPort?

Sorry for the double post. I see that the big DDC bug reporting thread https://devtalk.nvidia.com/default/topic/572292/linux/gddccontrol-issues-with-nvidia-drivers-i2c-monitor-display-ddc-dp-hdmi-failing/ has people reporting seemingly several different bugs, so I guess I should start a separate one specifically for Pascal+DP configurations.

So far I cannot find a single person on the web having this work on Linux, regardless of driver versions. And it’s not broken on Windows. So I believe this must be a Linux driver bug. Can anyone confirm this or prove otherwise?

This is such an annoying bug that’s been around for so long, I’m not sure it will ever be noticed by Nvidia. :(

Using Linux-x86_64 NVIDIA Driver 387.34 Xorg 1.19.5 GeForce GTX 1080 with one DVI display and one DisplayPort display.

In Linux DDC only detects DVI display, no DDC through DisplayPort.
In Windows 10 both displays DDC are detected and work perfectly.

So has to be an issue with the NVIDIA Linux/Xorg driver.

I just found out that DDC/CI over DP finally works! I’m on Nvidia driver 415.25.