Comment 16 for bug 1431149

I don't have light-locker installed, using GDM3 instead, and just upgraded to Bionic, but this bug appears to have reared it's ugly head again. The solution however of changing IgnoreLid to true in UPower.conf clears up the problem. Hats off to piotr-wroclaw for figuring this out.

This solution also doesn't affect any of the other desktops I have installed, which is Gnome 3 and Unity. All three desktops now suspend and resume correctly as expected when closing the lid. Just remember to reboot so the settings take affect.