Im using ubuntu on a virtual machine, after 6 hours of opened session ubuntu automatically close it, and my opened programs too.In setings i put to dont close the session but it still closing.
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I think this is because this is the lock screen which if you leave the computer running someone could not do stuff look in the power management settings to change that – lnee Jun 24 '22 at 11:48
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Also edit in Ubuntu flavor or desktop environment – lnee Jun 24 '22 at 11:50
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Does this answer your question? [How to set custom lock screen time in Ubuntu 18.04](https://askubuntu.com/questions/1042641/how-to-set-custom-lock-screen-time-in-ubuntu-18-04) – karel Jun 26 '22 at 10:07