Is there a way set my computer to go to sleep in an interval other than what Power Management offers?
I want it to sleep after 5 minutes of inactivity?
There is no pick for that in Power Management. This is for Ubuntu Mate 20.04.
Thanks.
Hi, @fixit7 (Andy) 
You've asked:
After several different Web searches, I've found the following Question and Answer in "Ask Ubuntu":
That question has been answered by N0rbert (who is @Norbert_X here in the "Ubuntu MATE Community"), on 7th December 2021, as follows:
https://askubuntu.com/a/1379706/52725
"You can set these options using commandline
gsettings set org.mate.power-manager sleep-computer-ac 1800 gsettings set org.mate.power-manager sleep-display-ac 1200 gsettings set org.mate.power-manager sleep-computer-battery 180 gsettings set org.mate.power-manager sleep-display-battery 120where numbers are seconds."
So, I'm guessing that if you want to "Put computer to sleep when inactive for" 5 minutes, "On AC Power", you should enter the following command, given that 5 minutes is 300 seconds:
gsettings set org.mate.power-manager sleep-computer-ac 300
I hope that helps
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Thank you very much ricmarques.
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I used this, but computer did not go to sleep.
gsettings set org.mate.power-manager sleep-computer-ac 300
gsettings set org.mate.power-manager sleep-display-ac 300
Does it require a reboot?
Because of frequent neck and back pain, I have some memory problems.
My computer does go to sleep after 5 minutes.
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Hi, Andy.
I see that you've added the last two lines of your last reply as a later edit:
" Because of frequent neck and back pain, I have some memory problems.
My computer does go to sleep after 5 minutes."
I'm sorry that you're having those health issues 
I hope that you're receiving the medical care for those problems and that you get well soon!
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Thanks for your concern.
After 30+ years, doctors can not find the cause or a treatment that works.
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