Display not wake up a often

[DiamantiFF]

I have a very strange problem with a ZBook G1 17 and NVIDIA Quadro K610M in windows 7, 8 or 10.I use SendMessage(mi.hwndMonitor, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM)2); to turn off the display.But often not works fine.It power off monitor, but when I press a key, the monitor power on but the screen remain blackThen I have to suspend in ram the nb with power off button configured and power on to have monitor wake up. This happens especially when:- Wake up before 90 seconds work fine.- Wake up after 90 seconds black screen. (but 1% success also)- Wake up after long tme but first at OS boot

Continue reading...