Comment 10 for bug 261084

It is 100% reproducible here: Standby via right-click-menu of the g-p-m icon: Standby once (as it should be), Pressing Fn+F4: Standby twice (Suspends, after closing and opening the display it resumes, beeps and suspends again. After closing and opening again (or pressing the little display lid switch or the power button) it resumes and stays up.

I don't know if I understand Brian correctly, but it sounds like it does loop endlessly on his laptop.