Sony Z Series comes out of Hibernate by itself

I have a Z46 Vaio and I have upgraded to Windows 7.

One problem which is a big concern is when I put it in to hibernate it automatically comes out of hibernate about 30 seconds later by itself.

Just yesterday I thought it had hibernated and I put it in a bag. Luckily I checked the laptop after about 10 minutes. The laptop was extremely hot in the bag and fully turned on.

I did a test and found it does in fact turn itself back on with out me doing anything. I have logged a call with Sony but they have not called me back.

I apologise if this has been covered elsewhere but has anyone found this problem?

 

the only time mine would come out of hibernation on it's own would be if i left the USB dongle for my logitech mouse connected.

 

It also happens to me randomly on my Z51

I have no idea why it happens.

 

Check whether Windows scheduled some tasks like update or virus scan to perform when you hibernate. Also check what did you set, like keyboard input, mouse, internet activity, to wake Windows from hibernation. I think there is a stupid default, at least back in the Vista days, that some activity on internet could wake the laptop up.

 

Thanks for the comments. I reset all power plans and settings back to defaults. This seems to have solved the problem but I still won't be putting the laptop in a bag for a while until I am sure. I wonder if a fried computer would be fixed under warranty under these circumstances.

 

I know on the Windows 7 desktop I just built, it kept being woken up without a good reason (ie. the power log said "unknown cause"). It turned out to be the Intel network card - it has two wake-on-lan settings turned on by default, and any PC on the network just checking if the PC was around caused it to wake up.

Disabled that and all is good - just proper scheduled events now (although I wasn't aware those were supposed to happen in hibernate?).

 

Contrary to popular belief, hibernate isn't the same as "turned off". It's like sleep with the CPU, RAM and FAN turned off. I.e. devices that are allowed to wake the computer still have enough power to enable them to do so, whether it's the network card, lid, keyboard, wwan modem, USB ports (to check whether you've moved a mouse), or audio card (which doubles as a fax modem).

Unfortunately, Microsoft Windows doesn't have any facility for "Hibernate, then turn off", but always go into low-power standby when hibernating. (With Linux, the situation is the opposite; you can't get it to go into low-power standby at all, and hibernate is followed by a hard HALT.) So to get the lowest possible power usage when hibernating with Windows, you have to go into the device driver and check every single device to ensure that they are allowed to be powered off to save power, and are not allowed to turn the computer on. And it's still going to use more power than being turned off.
Alternatively, hibernate, then remove the battery for at least five minutes, then put it back in. That will drain the capacitors which work as a backup battery during battery change, and the machine will enter a real OFF state.

 

I wonder if there's a way to keep a sleeping (not hibernating) PC... asleep in Windows 7. I have a laptop in my bedroom, and the last thing I want it to do is keep waking up at random times to update, defrag or virus scan, but alternatively I do want it "always ready" when I open the screen.

When my XP-based SZ160 goes asleep, it STAYS asleep.

 

Can you tell me which components are typical culprits? The only component I could find through Device Manager that had power management settings was the Wifi adaptor.

 

Did you play with Media Center? Media center will wake the machine up in the middle of the night to perform maintenance.