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Sleep vs Hibernate

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What is the difference between them?

And what is does the Run line of each look like? I have seen "system32\rundll32.exe PowrProf.dll, SetSuspendState" for hibernate but others say it is for sleep.

11 replies

by wesley.chin

Thanks for the information. Those sites indicated verified my thinking of the functions. The thing that got me doubting myself is that the run line I mentioned reportedly was to put the computer into sleep, but instead it hibernated. That makes me wonder what the run line looks like for sleep. Any ideas?

by ic-it

rundll32.exe PowrProf.dll, SetSuspendState
from a cmd prompt immediately placed my ssytem in a suspend state.
You may want to check the BIOS on the system in question to determine if different S levels are enabled.

by robo_dev

hibernate writes the system state to a file and powers down.

sleep just puts it in standby-power mode, which stops HDD, and kills video, among other things.

by wesley.chin

What is your OS?

What did the splash screen indicate? For me, it indicated that the computer was hibernating.

When you were in suspend, what did you need to do to get the computer running again?

by ic-it

XP Pro
Preparing to Standby
Ctrl key
Extra Data; Under my Power settings I do not have Hibernation enabled.

by david.wallis

hibernate copies your session to the harddisk for safe keeping (removing power doesnt affect it toshiba say hibernate lasts for just over 20 days)

sleep is stored in ram, if you take power away from the laptop you los eeverything. Basically sleep is faster but supposed to be for shorter periods :)

by wesley.chin

Now I know why the run line is the same for both hibernate and standby.

Which brings me to the next question.
In TR, there had been a post about scheduling a task, with the wake up computer option selected, as a way to get a computer active after putting a period of hibernation.

I had scheduled a message pop up to wake the computer. It did not work. Then I put the computer on standby, but still it did not work. Which makes me wonder....

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