https://bugs.freedesktop.org/show_bug.cgi?id=39683
--- Comment #7 from aaron chainsawbike@gmail.com 2011-08-06 03:45:40 PDT --- i checked the settings and found nothing, so i decided to switch the displays around to see what happens... original layout (1): dvi -> 1 hdmi -> 2 dp -> 3
layout 2: dvi -> 2 hdmi -> 1 dp -> 3 ran xset dpms force off via ssh all 3 turned back on but "3" was distinctly after 1,2 (under setup 1 they all turn back on at about the same time the second time round) xset -q says displays off same result every time
layout 3: dvi -> 3 hdmi -> 2 dp -> 1 same result as layout 1 but it starts at a different point in the loop - xrandr says display on but display 3 is off immediately after starting X
it may have something to do with a race condition relating to the speeds the dislays "start" ( i probably have no idea what i am talking about...) as when setting up xorg.conf if i used "right-of" it complained about missing modes or something - it only worked as i expected it to when "left-of"'d from display 3 will investigate further in the next few days