Uptime computer calendar graph not showing that computer is sleeping

[ngalioto]

The uptime computer calendar graph works well for showing when computers are awake or asleep with windows 7 OS, but not working with Windows 8.1. I know that my Windows 8.1 computer is going to sleep, but in the uptime calendar the reports shows the computer as always awake.

Is this a bug? Can it be fixed?

[Hemoco · Accepted solution]

Uptime events are pulled from the client machine's Event Viewer. For "start sleep" events, we look for the event ID below. We assume that your problem machines are either not going into sleep mode as they should or are not logging the event in their Event Viewer for whatever reason.

Event ID: 42
Log Name: System
Source: Kernel-Power