https://bugs.freedesktop.org/show_bug.cgi?id=111487
--- Comment #3 from bzz bzz@atomicbee.cz --- this issue seems connected also with HDMI. I've connected whole desktop to older display, which has only DVI input and used cable deskto-HDMI -> display-DVI and there is no issue, when i turn off the display.
(the flickering is still there but at least i don't have "solid green screen"