hiberate, lid closed thinkpad X1

Hi I brought up the topic a while ago, and it is really something I am missing much. Here is the situation. 1. I posses a Thinkpad X1 running Ubuntu 16.04 2. On top of that trinity 4:14.0.6. 3. When I use the gnome desktop shipped by Ubuntu, closing the lid hibernates my laptop. 4. When I try the same under trinity it does not work, also I configured TDEPowersave to do that precisely hibernate when lid is closing. 5. I can hibernate in trinity either pressing FN 4 or using the shutdown menu. I am really desperate, it must be a bug, did anybody make some progress in resolving this issue? Regards Uwe Brauer