I have set my computer ( not a notebook) to suspend after x minutes of idle. This has turned out to work very unreliable.
It used to work pretty reliably about 4 weeks ago when I first set it up (by pretty reliable I mean it used to work more than it didn't, while still not working quite often).
Reliability has degraded significantly in those 4 weeks. Right now, it hasn't worked for a week.
I can suspend the computer manually no problem.
I would be thankful for pointers and ideas how to investigate / solve this issue.