For the last week or so, my ThinkPad X1 Extreme and external monitors are not going to sleep when the system is inactive. Here is a screenshot of my current power settings:
Gday @Shema , Is this dual boot?
If you have windows still on the machine,
I would suggest you check the power options. Goto Control Panel/Power Options. On the left Side, there should be an option to "Choose what happens when lid is closed". Click on that, and select what you wish to do when you close the lid. ( "Uncheck fast bootup" ).