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It does not support DP+ > so passive DP-to-HDMI adapters won't work. > I tested this on master (2942242dde896) + v2 of the eDP driver as listed in the cover letter, or with v3 of the eDP driver + 48f05c3b4b701ae7687fd44d462c88b7ac67e952 and in both cases I have weird behaviors. First, `reboot` is stuck for a very long time before actually rebooting. I think you have a stacktrace when you tried yourself, I don't so cannot send one. Also, I tested on two different DP displays, one has a green tint, the other one purple. When trying out other resolutions with modetest, the kernel would often crash (no trace, just nothing on console, SSH dead). Note that the same HW setup with downstream kernel from https://git.theobroma-systems.com/tiger-linux.git/log/?h=linux-6.1-stan-rkr3.2-tiger works just fine. I would assume this has nothing to do with this Device Tree patch here but rather the eDP patches missing some bits maybe? @Damon do you have some idea? The display with green tint is a Iiyama ProLite XU2294HSU and the one with the purple tint is a Dell P2319H if that helps. modetest output: https://paste.debian.net/1387797/. modetest output with downstream kernel: https://paste.debian.net/1387798/ The Device Tree looks good to me otherwise. Cheers, Quentin