On my Thinkpad X1 running F29 (Mate desktop if it matters), closing the lid doesn't put the computer to sleep reliably. I believe that it works the first time after boot, but after that it does not. I can manually suspend the system though.
I'm starting with upower because I forgot that I had a problem with F27 as well when I updated to upower-0.99.8 from updates-testing (I rolled back to the previous upower release and it worked and I forgot to go back and investigate and file a bug report - sorry about that).
I'm not sure what debugging steps, logs, etc. are useful - just let me know.
I have been seeing this on F30 as well but I haven't got enough data to file what I think would be a qualified bug. Alas, I've had a lot of battery drain from a closed laptop not having suspended. If there are diag steps I am happy to try them.
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