I have a Thinkpad x220 notebook running latest Cauldron in KDE.
When I close the lid, the system goes to sleep mode - and it awakes
fine.  If I close the lid again, the system will not sleep.  When I
choose logout, turn off computer and then "sleep to ram" it also doesn't
do anything.  So the suspend operation only can be done once, then I
have to reboot to reset it.