Why does my Vista wake up randomly? (1 Viewer)

[Maschine]

Hi,

some days ago I installed Vista (Business) on the HTPC (XP had big troubles hibernating the PC, maybe a bad driver, and I got the Vista licence for free). Now hibernating works good, no more crashes during hibernation, but now the PC randomly wakes up.

Sometimes it's just 1 minute after MP hibernated the machine, sometimes 10 minutes and sometimes 1 hour or more. I can see no reason in the logs, neiter in the MP logs, nor in the system event logs.

I chose the most energy-saving option from Vistas new energy options

I didn't change any hardware or BIOS settings compared to the XP install.

I'm running out of ideas here, please help my HTPC to get his nightly sleep back

Thanks,
Maschine

 

[Roberdin]

I suspect that you have, but have you tried enabling extended logging in the power management plug-in?

 

[samuel337]

lol, I've been having the exact same problem on my XP machine the last few weeks. Ended up having to disable all startup apps, and re-enable them one by one. There was also a patch available for fixing XP's inability to hibernate when you have more than 1GB of RAM. It sleeps fine now, but I have no idea what kept it up.

Anyway, you're on Vista so that doesn't really apply. But if there's nothing in MP's logs, I suggest you try disabling startup apps and then re-enabling them gradually because it may not be an MP problem.

I dug into the Windows API and couldn't find something that tells you *what* woke it up. I found stuff that could tell you when it was set to wake up, but not what. Vista may have changed that, but I don't think so.

Sam

 

[Maschine]

Thanks for your answers! I have enabled extensive logging in MP, but I really don't think it's a MP problem. I tried also to hibernate with Vista's hibernation fuctions and MP not running - same problem.

Not beeing able to find out "what" woke up the PC is the hardest part I think. As Sam pointed out, one can see when the machine woke up, but not which process caused it :/

I read on some forums that Vista has some administrative services like defrag or indexing enabled by default to wake up the PC. Pretty stupid IMHO But unfortunately I didn't find a setting yet to disable that...

Well seems I have to live with that

Maschine

 

[samuel337]

I think you would find those services either in Scheduled Tasks, or under the Services bit in Administrative Tools. Not sure, as I haven't had time to load Vista yet.

I would try disabling startup items first, because they're easier to disable.

Sam