14

I've been able to successfully hibernate and resume my Ubuntu 12.04 Desktop PC using procedure that I've documented in this answer. However, I now have a problem that whenever the PC resumes, it does not locks the screen.

How can I lock the screen after the system resumes back from hibernation?

Community
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Vikrant Chaudhary
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5 Answers5

12

I have added an alias into ~/.bashrc file

alias hibernate='sudo echo "Hibernating..."; gnome-screensaver-command -l; sudo pm-hibernate;'

So that it locks the screen before hibernating.

Elin Y.
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  • 9
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5

I've been able to workaround this issue, by using the following command

sudo pm-hibernate; gnome-screensaver-command -l

Do note that, you should run this as a normal user and not as root user for locking to work, because by default in Ubuntu, there is no password for the root user so after resume, lock-screen can be unlocked by simply shaking the mouse.

Jorge Castro
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Vikrant Chaudhary
  • 369
3

i have another workaround. i copied this from /etc/acpi/sleep.sh to /etc/acpi/hibernate.sh just before pm-hibernate

if [ x$LOCK_SCREEN = xtrue ]; then
    if pidof xscreensaver > /dev/null; then
    for x in /tmp/.X11-unix/*; do
        displaynum=`echo $x | sed s#/tmp/.X11-unix/X##`
        getXuser;
        if [ x"$XAUTHORITY" != x"" ]; then
        export DISPLAY=":$displaynum"
        . /usr/share/acpi-support/screenblank
        fi
    done
    fi
fi

now i can hibernate with lock from power menu or a sleep button

mzzzzb
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0

Not on Ubuntu, but the following works for me:

systemd-inhibit --what sleep --why "Lock screen" --mode delay xdg-screensaver lock & systemctl suspend

Replace xdg-screensaver lock with the command to lock the screen on your system and systemctl suspend with systemctl hibernate if you want to lock the screen before hibernating.

This works by locking the screen in parallel to suspending the machine. However the screen locking command is running as inhibitor that delays the sleep. This way, systemd will wait until the screen is locked before executing.

If you have inhibitors that are blocking the suspend, add the -i flag at the end.

piegames
  • 278
0

There is a better way which automatically locks the screen before hibernating with systemd

Create a file in /etc/systemd/system/lock-on-hibernate.service With the following content:

[Unit]
Description="Make extra sure to lock the screen when hibernating"

[Service]
Type=oneshot
ExecStart=loginctl lock-sessions


[Install]
WantedBy=hibernate.target

Then enable it with

sudo systemctl daemon-reload
sudo systemctl enable lock-on-hibernate.service

Now hibernatw just like normal systemctl hibernate It will lock your screen automatically before you resume

Note: I'm on fedora 37 and your system may use different hibernation system. So in case make sure you use the correct WantedBy target. (e.gWantedBy=systemd-hibernate.target)

Khaled
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