I'm running 18.10 on an Envy x360 and sometime in the last week or so it's intermittently failing to sleep/suspend after I close the lid. It works sometimes but it's either usage or just time that causes it to stop. Like if I reboot and suspend in the first few minutes it works. But after using it to surf the web for an hour or so, it doesn't suspend when I close the lid. I can't lift the lid and start working again either.. I have to hard shut down by holding the power button.
Does anybody know what logs I could check to start trouble shooting this?