https://bugs.freedesktop.org/show_bug.cgi?id=94903
--- Comment #3 from John Galt johngaltfirstrun@gmail.com --- I've been able to "fix" the issue for tahiti and hawaii (without amdgpu) by forcing an even 60.0hz refresh rate on this display. Despite the workaround, I believe there's still a bug here. So I'm leaving the report open.