ddcutil
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Not working via HP USB-C Dock Gen 5
When trying to use ddcutil with a HP USB-C Dock Gen 5, all DDC communication fails. When connecting the display directly to the Laptop it works.
amdgpu support for I2C on docking station is a work in progress. I suggest you file a bug report at https://gitlab.freedesktop.org/drm/amd/-/issues. Let me know when you have and I'll add myself to the interested parties list.