Using power saving ( hibernate mode )

Hi there!
I don’t use a laptop, but a desktop machine, nevertheless I want to use ACPI power saving, precisely hibernation. I use openSUSE 11.1, acpid is running. I have the following GRUB confiuration:

kernel /boot/vmlinuz- root=/dev/disk/by-id/ata-ST3160023A_5JS0V55G-part1 resume=/dev/disk/by-id/ata-ST3160023A_5JS0V55G-part5

Does the resume option mean, the swap partition is used for hibernation? The names partition above is normally my swap partition…

In KDE 4.1 I have a button “hibernate”, but I don’t dare to press it, how do I wake up the machine if it works?

Hibernation is ACPI state S4, right? cat /sys/power/state says: standby disk
So Hibernation is supported?

Thanx for any enlightenment!

Yes, swap partition is used to save memory when suspending to disk.
That’s why your swap should be at least as big as your memory.
After suspend to disk the pc is powered off so to wake it up you just need to power it on.

Thanx for the hint, since I have 2GB RAM and my swap is only 1 GB I need to expand swap. I only hope, hibernate will work well with my machine :\