Based on your experiment, it works when there is a type-C dongle in between, which might be the ddc bus and ddi port mapping issue. I'd like check if Intel development tree contains a correct mapping for you.
Sorry that I am now on CNY vacation, I'll see if I can find the same model as yours, then get back to you ASAP.
Hello,
Would you please try this kernel to see if it works for you? /kernel. ubuntu. com/~kernel- ppa/mainline/ drm-tip/ current/
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Based on your experiment, it works when there is a type-C dongle in between, which might be the ddc bus and ddi port mapping issue. I'd like check if Intel development tree contains a correct mapping for you.
Sorry that I am now on CNY vacation, I'll see if I can find the same model as yours, then get back to you ASAP.
Thanks,