https://bugs.freedesktop.org/show_bug.cgi?id=102646
--- Comment #38 from bmilreu@gmail.com --- (In reply to Alex Deucher from comment #36)
*** Bug 105300 has been marked as a duplicate of this bug. ***
https://bugs.freedesktop.org/show_bug.cgi?id=108322 - Also related.
When I tested 4.18 kernel the bug used to trigger only @>73hz after sleep/wakeup. In latest drm-next-4.21-wip triggers as soon as I switch to 75hz. If I switch back from 75hz to 60hz it keeps flickering until I manually turn my monitor off/on.