Power Saving for the Workstation, Part 2 - page 4
Automatically Suspending to RAM
If the preceeding method doesn't work for you, and you have the right kernel functions built in, installing the programs (
swsusp) via Debian
aptitude might work, but watch carefully what
apt-get might tell you about packages it wants to remove.
If the method described here fails, Tux-on-Ice (formerly called
suspend2, name changeover still in progress) provides a special kernel module to facilitate suspend/hibernate. You'll have to rebuild the kernel to make it work. For more information, go to the site, they have extensive documentation and a mailing list. There will also be a replacement suspend (
PM_SUSPEND) built into kernel versions 2.6.21+, this may work better for you.
Note that there are two competing developer groups and suspend/hibernate implementations at this point. The biggest difference for the user is that the suspend software from the Tux-on-ice has to be separately downloaded and compiled by the user into a custom kernel.
SOFTWARE_SUSPEND and soon,
PM_SUSPEND are built-in.