Is that possible? Say, lock all the opened sessions?

You can use this script to lock the screen:

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qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock

There is no qdbus in my PATH... What is it?

Which KDE version are you using? qdbus should be available for KDE 4.

So it's clear about 3.5..?

Then try

Code: Select all

dcop kdesktop KScreensaverIface lock


Nice. Thank you.

If your problem is solved, please add a [solved] tag to the thread title.

LinuxIsInnovation wrote:If your problem is solved, please add a [solved] tag to the thread title.

I think, yes. I have to lock session of each user separately, but is fine as for me.

.. but not really.
On another machine I try that with
sudo -H -u target_user dcop kdesktop KScreensaverIface lock
and it says, it can't attach to DCOP server.

Andother way
dcop --all-users --all-sessions kdesktop KScreensaverIface lock
fails too and complains, that "DCOPClient::attachInternal. Attach failed Could not open network socket" ant then again about attaching.


This is bad. I am sure, firewall is not to blame there. Is 3.5.7 KDE. Please, I don't want to upgrade, can I solve it there?

Do you have xscreensaver activated?
Try this:

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xscreensaver-command -lock

It could be: no.
No "xscreensaver-command" to execute...

Time flies...
Now it's kde4 and the same question, a bit changed like this: "how to lock all KDE sessions from acpi shell script"?

You need to get a list of all logged in users, then run the following command as them. The appropriate D-Bus session bus should be found automatically.

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qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock

Well I call this from my konsole:

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get_login_users() {
  who -u | egrep -o "^[^ ]*" | sort | uniq
}

do_lock() {
  for u in $(get_login_users)
  do
    sudo -u $u /usr/bin/qdbus org.kde.screensaver /ScreenSaver Lock
  done
}

do_lock

.. and it works, but I call it from vt2 and it complains about inability to connect to X11! What to do? I intended to use from an acpi script so...