I have come across a Lenovo IdeaCentre A540-24ICB system with a scheduled task that wakes the computer to start my application and it seems to start but the system goes back to sleep right away. Sometimes it appears to not start (or goes to sleep so fast nothing is logged yet) so I checked the Windows power sleep options to ensure "Allow wake timers" was enabled but it didn't exist! Searching online I found a registry entry to add to have it show up in the power options and then ensured it's was enabled. However, didn't make a difference.
I have to use the mouse/keyboard for the computer to wake long enough to run the application (it will start where it left off). The application has been used for years and waking and running has worked. It already tells the system to not go to sleep through the api call in the main processing thread (which could take a fraction of a second to get to):
SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED);
I thought that API was enough to prevent system from going to sleep? As mentioned, it has worked for years. It's just this new Lenovo system or the Win10 installed with it doesn't seem to honor it? Is there some other API call that needs to be called? or any checks / fix the app should do to ensure the SetThreadExecutionState() will work?
TIA!!