What's the difference between Hibernate and Standby?

**BriCubz** · 08-14-2004, 02:11 AM

I'm my home computer I use the "Always On" power scheme because I'm basically always using the computer. When I'm not going to use it for a while I turn it off... Basically I'm not too familiar with Hibernate and Standby. I know that when the PC Hibernates it stores whatever is in memory on the hard disks. How does this compare with what Standby does? In both of these power-saving modes will my Computer come back to it's normal state after just moving the mouse, or would I have to push the "wake" button or whatever it is on my keyboard? How much, if any, power is the computer drawing while in these modes?

Thanks in advance.

Brian

**Rykielz** · 08-14-2004, 02:14 AM

when in hibernation mode no power is consumed, but in standby mode it takes power.
for hibernation (for me anyways) i have to hit the pwr button to start the comp again, but stand by resumes after a shake of the mouse.

**frodobaggins** · 08-14-2004, 02:17 AM

Standby shuts off everything but power to your ram, and keeps the current computer state in ram.

Hibernate writes the computers state to a special file and then shuts down everything.

**BriCubz** · 08-17-2004, 07:11 PM

Okay, another question... I've set my home computer to hibernate, and when it goes into hibernation it shuts off automatically. When my car's computer goes into hibernation it comes up with a screen that says "it is now safe to turn off your computer" or something and I have to cut the power manually. How do I make it switch off automatically when it goes into hibernation? they both run on Windows XP.

Thanks!

Brian

**hd54321** · 08-17-2004, 07:26 PM

Originally Posted by BriCubz

Okay, another question... I've set my home computer to hibernate, and when it goes into hibernation it shuts off automatically. When my car's computer goes into hibernation it comes up with a screen that says "it is now safe to turn off your computer" or something and I have to cut the power manually. How do I make it switch off automatically when it goes into hibernation? they both run on Windows XP.

Thanks!

Brian

Brian - not sure what kind of motherboard your car computer is using but the newer motherboards (i'm talking about motherboards made around the time of win me's first release) have a circuit built-in that will allow a shutdown signal to be sent from the OS to fully shut-off the computer without user intervention (i.e. physically pressing the power button). Previously, when the OS was shut down, a user had to physically turn off the computer by pressing the power button.

Maybe your car computer's motherboard is older and does not have this feature thus requiring you to press the power button when you hibernate the computer. If not, google your problem and you may find a resolution.

Good Luck

-HD

**BriCubz** · 08-17-2004, 07:31 PM

My car caomputer's motherboard is an Epia mini-itx motherboard. I bought it new a couple of months ago. I think the model is Epia V8000A. It's an 800MHz CS CPU. I would think this would be new enough. The last time I had a computer that didn't automatically shut down I think I was running Win 95. Anyway, thank you for your help.

**supasigma** · 08-17-2004, 08:51 PM

Try to rerun setup.I had that problem with my home pc.Rerunning setup solved the problem.

**frodobaggins** · 08-17-2004, 09:53 PM

open up device manager, show hidden devices
make sure apm is enabled

**Imagex** · 08-17-2004, 10:32 PM

There are also 4 levels of sleep, your mother board must support them to use them and also what you use to wake the computer matters, to get to a S3 sleep mode you cant use usb in most cases. and BTW S4 is hibernate. I had to read the whole ACPI white papers few weeks ago

Sleeping State Definitions

S1 Sleeping State:
The S1 sleeping state is a low wake-up latency sleeping state. In this state, no system context is lost (CPU or chip set) and hardware maintains all system context.

S2 Sleeping State
The S2 sleeping state is a low wake-up latency sleeping state. This state is similar to the S1 sleeping state except the CPU and system cache context is lost (the OS is responsible for maintaining the caches and CPU context). Control starts from the processor’s reset vector after the wake-up event.

S3 Sleeping State:
The S3 sleeping state is a low wake-up latency sleeping state where all system context is lost except system memory. CPU, cache, and chip set context are lost in this state. Hardware maintains memory context and restores some CPU and L2 configuration context. Control starts from the processor’s reset vector after the wake-up event.

S4 Sleeping State:
The S4 sleeping state is the lowest power, longest wake-up latency sleeping state supported by ACPI. In order to reduce power to a minimum, it is assumed that the hardware platform has powered off all devices. Platform context is maintained.