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I'm using Xubuntu 12.04. In the Power Manager, I have checked Extended -> Lock screen when going for suspend/hibernate. If I choose to suspend from the main menu / Panel 1, the screen is locked. However, if I use dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Suspend (see How can I suspend/hibernate from command line?; I use this command via a keyboard shortcut), the screen is not locked. How can I (1) suspend the system (2) have the screen locked at the same time (3) do not require root rights to do so [since I would like the command to be assigned to a keyboard shortcut].

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1 Answer

up vote 6 down vote accepted

You can do that by using the following:

gnome-screensaver-command --lock && dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Suspend

In a keyboard shortcut you need to put sh -c "<command>" replacing <command> with the command above, like:

sh -c "gnome-screensaver-command --lock && dbus-send --system --print-reply --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.Suspend"

If the above command does not work, you can also try using a shell script file (for example suspend_lockscreen.sh). First create the file call the following commands in a console:

cd ~
echo "gnome-screensaver-command --lock" >> suspend_lockscreen.sh
echo "dbus-send --system --print-reply --dest=org.freedesktop.UPower /org/freedesktop/UPower org.freedesktop.UPower.Suspend" >> suspend_lockscreen.sh
chmod +x suspend_lockscreen.sh

That will create a file named suspend_lockscreen.sh in the user home folder. Then, in the shortcut just call: ./suspend_lockscreen.sh.

Note: gnome-screensaver-command can be replaced by xscreensaver-command, as pointed out in one comment.

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Nope it does only lock the screen and forgets about suspending it according to a comment made in the answer I made ;) –  Rinzwind May 17 '12 at 23:20
Ahh, good. I just realized that gnome-screensaver-command can also be replaced by xscreensaver-command so no additional installation is required. Without the && dbus-send... part one simply gets a lock (without suspend); with it, one gets a suspend with lock on wake-up. Perfect. –  Marius Hofert May 17 '12 at 23:34
Unfortunately, the command works from the terminal but not from the keyboard shortcut I defined :-( Do you know what might be the problem? –  Marius Hofert May 17 '12 at 23:41
@MariusHofert I've updated the answer with how to use the commands from a keyboard shurtcut. See if it works as you need. (I've tested in Ubuntu 12.04 and it worked). –  amfcosta May 18 '12 at 14:06
Still the same problem: locking works; suspending does not (Xubuntu 12.04) –  Marius Hofert May 18 '12 at 18:36
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