https://bugs.freedesktop.org/show_bug.cgi?id=107978
--- Comment #13 from Nicholas Kazlauskas nicholas.kazlauskas@amd.com --- (In reply to Shmerl from comment #12)
@Nicholas Kazlauskas: does it help to identify the source of the problem?
If I had to guess I would say this is an issue specific to that monitor - DP 1.2 should generally work without issue.
This does help narrow down the problem, thanks.