https://bugs.freedesktop.org/show_bug.cgi?id=110217
--- Comment #2 from numzer0@yandex.ru --- Created attachment 143756 --> https://bugs.freedesktop.org/attachment.cgi?id=143756&action=edit Xorg config
If I uncomment the proper `Output-...` option, Xorg starts in the correct mode but with flicker. That’s true both for `amdgpu` and `modesetting` drivers IIRC.