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#1
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Sleep or hibernate
What's the difference between sleep and hibernate? Does the computer
come on when you move the mouse or touch a key with both of them. When running Superantispyware it give me choices: when it's done to shutdown sleep or hibernate which should I choose if I'll be using it right away and don't want to have to go through a startup Jeff |
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#2
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Sleep or hibernate
Jeff T. wrote:
What's the difference between sleep and hibernate? Does the computer come on when you move the mouse or touch a key with both of them. When running Superantispyware it give me choices: when it's done to shutdown sleep or hibernate which should I choose if I'll be using it right away and don't want to have to go through a startup Jeff Sleep and hibernate, are states where the CPU is not running. Their intention is to save power, while you're not using the computer. And at the same time, to preserve the system state (open programs) for you. Sleep stores the session in RAM. This is a form of volatile storage. If the AC power were to go off, the computer eventually runs out of +5VSB to power the RAM. All your work (open files not saved) would be lost. Hibernate, stored the contents of RAM onto the hard drive, in hiberfil.sys file. When a computer is restarted, after being in hibernation state, the disk contents are read and put back into RAM. Then, the program counter is loaded with the last used address, and the computer picks up where it left off. Hybrid sleep is available on some later OSes. It stored the session in both RAM and disk. If the computer is not powered off, the RAM stuff can be used directly. If the computer is powered off, the contents of the hiberfil.sys are there. ******* "Wake-up" is a separate issue. Pressing the power button on the front of the computer, is likely to always work. The power button is biased by +5VSB, and if the ATX supply is getting any power at all inside, it makes that voltage. The power button is not likely to be gated off. Wake on mouse or Wake on keyboard, require two things. They need electrical power. Modern motherboards always run the keyboard and mouse from +5VSB. On some keyboards (like mine), I see a glowing LED which tells me when the computer is off, the keyboard has power. The second necessary step, is a visit to Device Manager. Do "Properties" on the mouse and keyboard entries. There should be a tab in properties, where it says "Allow this device to bring the computer out of Standby". That should be ticked. In the BIOS, there is an entire page dedicated to power related things. And wake functions (with the abbreviation PME or Power Management Event) can be found there. If the Device Manager entry was grayed out, you could check the BIOS to see if something there is the issue. PCI cards have an actual PME signal available to them. THat's how a NIC (network) card is able to wake up the computer, if a Wake On LAN packet is received. The chipset also has PME, and the mouse and keyboard may eventually find their way to driving such a signal. So a number of things have waking capabilities. And other things do not - your hard drive cannot wake the computer, if the hard drive is having a bad day. It's the keyboard, mouse, touchpad, NIC, Wifi (for the ones that are "Always On) and so on. ******* You want "Sleep" for the situation you describe. The Power Button is most likely guarantee to wake it up. Whereas other HID devices, may need Device Manager adjustments. And you test Sleep, with the computer booted, and not doing anything important. Make sure Sleep is working properly, before trusting open files to it, so you don't lose any work. Occasionally, a computer with bad RAM, cannot sleep properly. Or, it can be the chipset which does not transition well, from fully powered, to sleep powered state. For those computers, simply use hibernate, as it's a more rock solid option. I think I've had at least one computer here, which doesn't sleep properly. So that one just hibernates if I want to take a break. HTH, Paul |
#3
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Sleep or hibernate
On Sun, 14 Dec 2014 09:00:04 -0600, "Jeff T."
wrote: What's the difference between sleep and hibernate? Does the computer come on when you move the mouse or touch a key with both of them. When running Superantispyware it give me choices: when it's done to shutdown sleep or hibernate which should I choose if I'll be using it right away and don't want to have to go through a startup Jeff I was trying to help the friend of the father of my friend. He's 93 and still practicing law, but his secretary was away and my friend can't help because he uses a Mac. He was trying to clean up some lawsuit papers written in Word, and I pretty much failed to help him -- I couldn't make things look right --, but he still took us out to dinner. We came back to my car and when I was leaving his office I told him he should use Hibernate, but his daughter said they couldn't risk the power going off. I started to explain that that didnt' matter, but got interrupted by something. Really, I'm 67 and if this guy is 93, he'd benefit even more than I from Hibernate, because you don't have to remember where you left off. So the question was, should I call his daughter and try once more to convince her that Hibernate is safe and she was thinking about Sleep?? I don't think she's the only one who conflates the two. (Even Sleep is safe if you don't have any non-saved work, don't mind using more electricity, and don't mind it much if the power does fail and you have to remember what you want to run.) I use Hibernate all the time (though in XP you have to set a setting somewhere to enable Hibernate. I wonder why that is.), so that, compared to Turn Off, it reminds me what I was doing (very important) and I don't have to restart everything, especially things that don't go back to exactly where I was. (Agent 1.93, for example.) Also most Windows updates don't get installed unless you Turn Off, but they don't send us updates for XP anymore anyhow. Also sometimes you have to restart to make Windows work right, but since Mayayana recommended Noscript, I've gone 6 weeks without Restarting, instead of the 10 days that used to be the max. (I"ve been meaning to thank Mayayana but waiting until I could formulate a related question. Thank you, M.) Before Windows had Hibernate, I bought some program that did the same thing. Didn't use it much because iirc the copying took so very long. Now I have much more RAM but it doesn't take long. Try it; you'll like it. I don't know why everyone doesn't use it. |
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