Created attachment 92230 [details] [review] possible fix There's nothing in your logs indicating a link failure when setting up the DP link. It seems like your panel is just especially picky about the timing in the link training or something like that. Try the attached patch. I've also pushed a branch with some other DP related patches that might help if you want to try it: http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.14-wip