Resuming after suspend the screen is locked (ok) but I can't input the password

You can replace the mate-screensave with light-locker.

sudo apt install light-locker

And then disable mate-screensaver.

mkdir -p ~/.config/autostart cp /etc/xdg/autostart/mate-screensaver.desktop ~/.config/autostart/ sed -i 's/^Exec=.*/Exec=/' ~/.config/autostart/mate-screensaver.desktop

You can also look at other lockers like i3lock or xsecurelock.

You can look at this thread for some reference. It may cause a delay coming out of suspend.

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