The script /usr/share/hal/scripts/hal-system-power-suspend looks for a variety of ways to do a suspend to ram. In the current Gentoo, the last two actions tried are: 1: echo mem into /sys/power/state 2: use /usr/sbin/hibernate-ram These should be the other way round. If the hibernate scripts have been installed then they should be used first as they do a whole bunch of other stuff and then echo into /sys/power/state. If hibernate scripts are not installed then it doesn't matter. As a data point, my laptop will not come out of suspend correctly if only approach #1 is taken (pcmcia is borked). Using hibernate-ram works perfectly. You may also want to fix this whole script to remove redundant items (eg looking for Redhat or Suse specific commands)
*** This bug has been marked as a duplicate of 133743 ***