Vista Wakes Up from Hibernate in Middle of the Night

I have Vista Ultimate running on my new Toshiba S-5034 notebook. In
the middle of the night, I don't know exactly when, the thing wakes
up for some reason and sucks up juice! Aaargh!

The notebook gets awfully hot in the bag as the fan struggles to
keep it cool in the confined space. I am left with a weak battery
for my commute too :-(

I thought that hibernate was the deepest power saving mode? The
hardware is completely powered off. It is only that the O/S saves
the CPU and memory state to HDD right and makes a boot-up "note" to
itself to restore the image? Therefore, can any task that was
running in Windows possibly wake up a system in hibernate state? I
don't think so because they aren't running.

Since the notebook is in my bag with no Ethernet or wireless on, I
am sure that Wake-on-LAN (WoL) couldn't possibly be the culprit for
problem or could it?

Yes, I am sure my notebook is in hibernate mode and *not* in sleep
mode. All lights go off on this Toshiba (there is a standby light)
and I have unplugged the notebook's battery and power adapter. I
can successfully resume where I left off after reattaching
everything and powering back on.

Can anyone offer any advice on this problem? TIA!

--

Oh yes, Vista will awaken from a hibernate state. My wife's wireless mouse
adapter will wake her computer if left plugged in overnight. If I remove
the wireless receiver from the USB port it sleeps until dawn. Check
hardware devices (disconnect all), make sure no scheduled tasks are running
and awakening the unit.

check the scheduled task log to see what is waking the computer up and maybe change its schedule to a different time.

Yeah, I have mine set to "Automatically download updates but let me
choose whether to install them". Does it do it at 3AM? There seems
to be nothing in the dialog to indicate that but I guess it could be
hard coded into Vista's auto-update system. I wish Vista would let
me change that. I'd probably change it to run on a weekday
afternoon like at lunchtime when I won't be on the notebook and I
know the notebook will be powered on to do the update.

I still think that *nothing* should be able to run in hibernate
mode. It means the CPU and memory are active which defeats
the purpose of hibernation.

For the rest of the week, I'm going to hibernate my notebook as
usual at night but unplug the notebook's battery! That way, it
couldn't possibly power on! Its a shame this poor hibernation
implementation forces me to do this though!

Great suggestion. There is an entry started on 7:14:46 AM on the
morning I found my notebook had powered itself on. I was sound
asleep at that time.

Information
5/24/2007 7:14:46 AM
Tcpip
4201
None
The system detected that network adapter Local Area Connection 2 was
connected to the network, and has initiated normal operation.

In addition, there are about a dozen of these duplicated at 7:14:46
AM and 7:14:47 AM. I think this might be the cause of the
unexpected wakeups. The notebook's Ethernet hardware is somehow
"glitching" and waking up the computer eventhough nothing is
connected to the notebook's Ethernet port.

I am pretty sure I wasn't sleep-walking because there was no
Ethernet cable or jack around to plug the notebook into!

Check in Device Manager and make sure under the network adapter under power
management it isn't allowed to wake the machine up

Interesting, I just checked in my Device Manager and my "Intel(R)
PRO/100 VE Network Connection" adapter has the check box "Allow this
device to wake the computer" *unchecked*.

Maybe there is some low level BIOS setting I should check the next
time I reboot this machine(?). At least I know where to focus my
investigation on now.

Look in the bios for a Wake on Lan option or power on pci(if your adapter is installed in a pci port). The latter is usually for modems.

how bout a wireless connection that is waking the laptop up? lol

see if the wireless network adaptor has the setting you checked for before

I had this same problem and checked the event logs/system and found entries for power-troubleshooter, which told me that it was Windows Media Centre updater that was running in the night and waking up the machine. Sure enough when I checked through the scheduled tasks under Microsoft/windows/medi player I found two entries for mcupdate, one of which was set to wake the computer to run. I unchecked this option from the conditions tab. I hope this helps someone.

We are seeing the same issue. Our laptop suddenly wakes up, always in
the middle of the night. Thank you for figuring this out.

<quote>I had this same problem and checked the event logs/system and found entries for power-troubleshooter, which told me that it was Windows Media Centre updater that was running in the night and waking up the machine. Sure enough when I checked through the scheduled tasks under Microsoft/windows/medi player I found two entries for mcupdate, one of which was set to wake the computer to run. I unchecked this option from the conditions tab. I hope this helps someone. <end quote>

Thank you sooooo much for this solution! It works! I had been breaking my brains over this one!