This is a problem that I've had for a very long time, and during this time have managed to 'narrow down' steps to repeat it (but still can't prevent)
First off, the problem is the PC will 'attempt' to go into sleep (ONLY monitors, rest is not set to sleep) but will result in a 'black' screen that is still receiving signal from the gpu. (IE: can see backlight bleed, removing from pc results in monitor losing signal as normal, re-attaching monitor 'wakes' up but is stuck at black screen, pc is 'frozen' in background and will not respond/wake up)
in powercfg (-requests) shows nothing is keeping monitor awake, all logs show no process 'interfering' with the process, nothing is starting/stopping during the time between 'last activity' and when the pc freezes, and it is completely random when it happens (IE: I have yet to find a way to 'force' it to happen, but have found wars it happens more often than not, will explain below)
I DO KNOW that when it WILL happen, the screen saver will NOT engage (IE Set screensaver for 1 min, set 'put monitors to sleep' @ 20min, IF the screensaver does not engage inside 1 min, I KNOW it will cause a pc freeze up. Again, its random when it will/will not happen, but due to the previous findings, I have set a screensaver for 1 min and if I see the screensaver hasn't engaged, I know it will freeze up, I CAN prevent it at this point by just going into screensaver and 'setting' it again(Changing SS to another, changing time, do anything then click 'apply' 'fixes' the issue for a short while)
I have also found that it happens more often than not when I am running a game (Black desert online), but its happened before even when the game was NOT running (So I am sure its not the sole cause of this)
It has also happened before when I have any program that prevents any kind of sleep (IE any other game, watching movie, etc, anything that normally prevents display sleep) then ending that activity, it will trigger the freeze up (Again, sometimes, not always, I cannot to this date, repeat steps 100% of the time to 'cause' the bug)
The issue never happens in safe mode (as expected, nothing runs that would prevent it, but attempted anyways) and does not happen when I clean boot. It only happens (again, not always) after I have run some application that prevents display sleep. (Once said activity is over)
This problem has been an issue for as long as I have owned this pc. Though multiple monitors, and 3 separate complete windows re-installs. (Complete format not just 'refresh')
So here I am hoping someone else has the same issue and has found the culprit that causes this.
Again when tracking temps, voltages, etc, nothing shows out of normal up to the instant it stops logging(at most 1-2 seconds before it freezes) unknown if something 'spikes' during the crash
(One more thing if it helps, is when this happens, and the pc freezes, if I am playing a game with any ambient sounds, those sounds continue to play: Ie looping music, background noises, etc, but any 'action' that's timed, ie: player sounds, npc's reacting, and so on, do not. Regardless even if said noises can be heard, pc will not wake, and I know its also 'unresponsive' when connecting to my tablets or phone - PC shows as offline to them)
Thank you for reading this overly long wall of text, and double thanks if anyone can help.
(pc specs maximus hero VII mobo, i7 4790k, 32gigs ram, 2x 980ti in SLI - happens even when I remove SLI, 520gb SSD HD main, 4tb backup slave drive.) Running windows 8.1 pro -64bit (With classic shell and all silly 'start menu' mobile interface removed or disabled. Configured to resemble windows 7, had issue happen during one of the times I re-installed windows without classic shell, so am pretty certain its not involved. Entire system is just a touch over 2 years old, other than this issue, have had no other problems, or any BSOD)
Edited by AtmaDarkwolf, 24 November 2017 - 02:49 PM.