I wouldn't say that Thinkpads are immune. Was braking my brain trying to figure out, why my X230 doesn't sleep properly. Turned out, USB hard drive was causing

I wouldn't say that Thinkpads are immune. Was braking my brain trying to figure out, why my X230 doesn't sleep properly. Turned out, USB hard drive was causing the issue, even when disconnected. Not sure, if it was hardware or drivers, but that drive was causing issue.