difference between hibernate and suspend???

[brian.harker]

hello all-

I am dual-booting WinXP and Fedora Core 4 on an Averatec 3200 series laptop (1.67 GHz mobile AMD Athlon, 1 GB RAM), and I recently started digging around in the kernel, trying to get the suspend-to-disk/hibernate stuff working. Well, long story short, I am able to successfully use hibernate, but it takes FOREVER to copy the system state to disk, and then reload the copied system when I hit the power button again.

I was under the impression that this should happen a lot quicker than it actually does, so can someone tell me if I'm just confused about the difference between "hibernating" a system, and "suspending" it? If there is a legitamate difference, how does one modify the ACPI stuff to suspend instead of hibernate? Thanks in advance for any help!!!

[brian.harker]

ok, so apparently hibernate is using /proc/acpi/sleep in mode 4 to suspend to disk. I tried changing the mode to 3 to suspend-to-RAM which should be quicker (right). The suspension appears to go fine, but it will not resume properly, it just reboots. Any ideas on how to get my system state back from RAM?

[Vergil83]

Hibernate copys the current state to the hard drive (so it is slower, but you can turn off the power). Suspended saves it to the ram (quicker but you need power).

What are you doing to bring it back from suspend (do you press the power button)?