Comment 2 for bug 1232814

Dirty workaround:
1. install and configure uswsusp if you haven't already
2. backup pm-suspend (it's just a symlink to ../lib/pm-utils/bin/pm-action)
cp /usr/sbin/pm-suspend /usr/sbin/pm-suspend-bak
3. replace it with s2disk
cp /usr/sbin/s2disk /usr/sbin/pm-suspend

You can now hibernate with s2disk from the menu via suspend entry, but have no entry for actually bringing the system into suspend mode.