I used to think that when I close the lid the system goes to sleep. But it's not. I did not use that functionality for quite a long time so I can't say when it was broken. Meantime I would like to get that feature back but I'm more a scientist than an IT specialist, so I need help with that. To begin with, acpi_listen sees events lid LID close and lid LID open. And I have the packages:
acpid-2.0.28 laptop-mode-tools-1.71-r1 pm-utils-1.4.10-r7 installed on my system. And it used to work on my system once, as I think. Or maybe there is some guide/manual which I couldn't find, then a link to it will be just Ok. Thanks ahead of time.