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Problem with Microsoft Windows Vista Ultimate Edition
Vista wakes up on it's own. Never goes to sleep.
I'm having 2 related but separate issues with the Vista Ultimate which came pre-installed on my HP Pavilion.
The first problem is that the machine wakes up on it's own after I have manually put it to sleep. This typically happens in the middle of the night but sometimes in the middle of the day. I've checked the "Power Troubleshooter" entries in the event log and they list the "Wake Source" as "Unknown" which isn't terribly helpful. I've already disabled my NIC, Mouse, and Keyboard from being able to wake the machine and gone through all of the devices in device manager and there are no other devices that I can find that are enabled to wake the computer. I've also gone through all of the scheduled tasks (including hidden ones) and none of them have permissions to wake the computer to run. I'm not sure what else to try. I did not have this problem when the computer was new so I suspect it may be related to something I have installed, but I would like to avoid uninstalling everything to troubleshoot that idea. What else can bring a computer out of sleep?
The second problem is that the machine never goes to sleep anymore, so when it wakes up it stays on wasting power. What I would like to find, if they exist, are tools which will help me troubleshoot what exactly is preventing the machine from going to sleep. Like the first problem, this did not happen when the computer was new. If I can solve this problem, I can live with the fact that the machine wakes up on it's own.
Solutions (2)
Sounds like you've tried all the obvious things. Did you check the BIOS settings and turn off all of the WAKE ON settings in there? Otherwise, it sounds like you might have a third party program which is scheduling without your knowledge (check your start up programs and running processes during normal use). If, when asleep, the machine runs a fan, it may also be waking up for the OS to receive a power or overheat warning message from the BIOS.
Problems with machines not going to sleep when asked are often related to drivers that are not unloading when asked to prepare for the sleep/hibernation process. If you have installed any new hardware (or driver heavy software like specialized encryption or hard drive management stuff) trying uninstalling it and testing the sleep functionality.
Ideas, anyway.
Another way to solve this would be to let it do the update at night, but then set it to go back to sleep. You can do it if you are comfy changing the registry values. Described here. http://annoyances-resolved.blogspot.com/2009/10/computer-goes-back-to-sleep-after-wake.html
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Yup - looks like two separate problems to me.
First, the unusual wake up. Check WAKE settings in the BIOS, then WAKE settings in the network interface card drivers (which have their own set) through PROPERTIES, and any third party software that might think it is responsible for WAKE or network conditions. If not an external device (also check voltage and heat warnings in the BIOS) event, then it must be something running in software like an update scheduling task that is not written properly. If you have a wireless card running, remember that they may seek to handshake at a period set by the router to reissue lease certtificates, and sometimes these periods are set to six or ten hours.
Also be aware under XP that saving your power settings under a new power profile with a new name has a different effect than simply changing the settings under an existing profile. I think what happens is that if there are any errors in power handling, it reloads whatever is the stored default for the last known good power profile.
The problem with it not timing out and suspending or hibernating, I bet, is related to a KEEP ACTIVE task running somewhere. Try killing every process the OS will allow and then watch it run down to hibernate and I bet it will go to sleep. I have also noticed (warning - black magic ahead) that some machines are reluctant to hibernate if the hibernation period is less than the screen saver being invoked and other power saving features getting a head start. I know that screen savers and hibernate have different invocation conditions which may, on some systems, need to go in order.
Anyway, good luck, let me know if any of these work...
Glad you found it - the media sharing thing is new to me, but reminds me that if your machine is on a (home) network and is hosting shared folders/files, this may, depending upon what other machines are on and running, keep it from entering hibernation, or wake unexpectedly once napping.