Computer won't sleep? Might be NFS...

[Karl Auer]

I ran into an issue where my laptop would not go to sleep. It would
start to go to sleep, but after 20 or so seconds would wake right back
up again.

I tracked it down to NFS-related processes refusing to freeze, and then
to this excellent solution, which I have tested and it works.

https://askubuntu.com/questions/1523090/failed-to-put-system-to-sleep-freezing-fails-due-to-nfs-kernel-thread-failing

Huge thanks to user Somebodeez, who joined askubuntu just to post that
solution after it turned up in the bug tracker.

I'm still a bit puzzled, because this started happening only yesterday,
but there is no evidence of nfs being updated since May. Perhaps some
other library or whatever got updated. Anyway, I'm not going to bother
tracking it down, as the above solution works for me.

Regards, K.

-- 
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Karl Auer (kauer at biplane.com.au, he/him)
http://www.biplane.com.au/kauer