Well, a funny workaround goes first: try setting in your bios some password which must be entered after any kind of power on (including suspend).
Really, I guess you have X running, right? So you can try suspending-to-ram with prepared xterm, and after it (blindly..) type 'xset dpms force on' in it - and run the command. Of course DPMS must be enabled in your xorg.conf (I guess it is, but check /etc/X11/xorg.conf or /etc/xorg.conf). If it works - maybe properly configured xscreensaver will help; otherwise you can write a script which will run this command every minute in background (no, you'll probably won't have to wait this minute) - ask for help.