I have 64-bit Windows 7 Pro installed on a OCZ Vertex 3 SSD. The machine automatically wakes straight up from sleep, whether it happens when after the timeout set in power settings for sleep, or when I manually tell the machine to sleep.
I have tried using the following command to see what device is waking up my computer:
but I always get:
Wake History Count - 0
I believe it might be related to the SSD, I have tried using the same hardware on a HDD, and have no problems with sleep. I have tried both a Vertex 2 and Vertex 3, and neither would go to sleep, with exactly the same behaviour from powercfg