I'm experiencing a somewhat similar problem on Samsung NF210 netbook (Ubuntu 12.04). Suspend works perfectly from the menu, but works only EVERY SECOND TIME by lid close. It works the first time after boot (OR after suspend from the menu), but doesn't if I try to suspend again. And then it again works. When it doesn't, screen goes off but nothing else happens. Viewing the syslog seems that it doesn't even try to suspend.
I'm experiencing a somewhat similar problem on Samsung NF210 netbook (Ubuntu 12.04). Suspend works perfectly from the menu, but works only EVERY SECOND TIME by lid close. It works the first time after boot (OR after suspend from the menu), but doesn't if I try to suspend again. And then it again works. When it doesn't, screen goes off but nothing else happens. Viewing the syslog seems that it doesn't even try to suspend.