[eqyiel]

I have the same problem with a Thinkpad x240. Never managed to figure it out, instead I just use suspend which works reliably.

[war1025]

I normally just use suspend too.

I would definitely suggest trying the 4.8 kernel as mentioned in another comment. So far I haven't been able to make it fail.

[sigjuice]

By any chance, do you know which kernel commit(s) fixed your issue? Maybe git bisect can pinpoint the commit? It would be interesting to know what the exact bug was.

[war1025]

This is the article: https://lwn.net/Articles/701639/