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Keyboard/Mouse not responding after screen is blanked

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Fab

I am using Focal Fossa. After the screen has been blanked for a while, the Keyboard/Mouse won't respond anymore so I can't resume the session. (Can tell the keyboard is not responsive since the caps lock light won't come up)

Not 100% sure if it's just the Keyboard/Mouse or if the system is completely frozen. Automatic Suspend is OFF and I am using Ubuntu default Gnome DE.

This wasn't an issue when I was initially testing on a partition on a NVMe drive. It started after I did a default full drive LVM encrypted installation on a Sata SSD on the same PC.

How can I troubleshoot the issue?

Workaround for now is to set the monitor to never blank screen and lock screen manually but I do need the auto lock if I want to be able to use it for work.

/edit pressing the power button for it to wake up does not work

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