https://forum.qt.io/topic/62549/applicationstatechanged-not-called-when-computer-goes-to-sleep
applicationStateChanged not called when computer goes to sleep | Qt Forum
Jan 11, 2016 - Hi I am looking for a way of detecting when the computer goes to sleep in my application. I am using Qt 5.3 and the target platform is Linux. I have found ap...
to sleepcalledcomputergoesqt