Ubuntu – Disable suspend after screen lock

laptoplock-screenpower-managementsuspend

I use Ubuntu 16.10 on a laptop (with closed lid) which is attached to a docking station and an external monitor.

After I lock (i.e. through ctrl+alt+l) my machine, ubuntu suspends itself after a few minutes. How can I disable this behavior?

I am aware of the Power options in the System Settings. My choices are as follows:
Maybe the problem could be solved by disabling "suspend when lid is closed" (as technically, the lid is closed when the device is attached to the docking station).
However, I would prefer to keep the "suspend when lid is closed" option since I also use the laptop without the docking station.

Thanks for your help!

Best Answer

You can try this. Open the terminal and type:

gksu gedit /etc/systemd/logind.conf

Set these two lines to look like this:

HandleLidSwitch=suspend
HandleLidSwitchDocked=ignore

Save the file, reboot and test it under the two environments (docked and undocked).

If unacceptable results, change your power settings to "Do nothing" on the lid close event where you have it set to "Suspend" now. You shouldn't have to reboot to test your two environments again.

Related Solutions

Ubuntu – screen is not locked after suspend/lid closed

Not a solution, but you may use this script as a workaround:

#!/bin/bash
qdbus com.canonical.Unity /com/canonical/Unity/Session com.canonical.Unity.Session.Lock &&
qdbus com.canonical.Unity  /com/canonical/Unity/Session com.canonical.Unity.Session.Suspend

This works with stock Ubuntu with Unity desktop. The approach is specific to Unity, although there are dbus calls to suspend regardless of the desktop environment. For 16.04 , one could use systemctl suspend command. See the relevant post: https://askubuntu.com/a/1795/295286

Alternative (older answer, edited)

One of the other tools for suspending, that works regardless of the Ubuntu version is pm-suspend. Problem is that it requires root privilege. To work around that, add pm-suspend to /etc/sudoers file to be executed without password ( more info here ).

In particular, in my /etc/sudoers I have the following:

# Allow using pm-suspend for my user without password
serg ALL = NOPASSWD: /usr/sbin/pm-suspend

Thus, you can use:

sh -c 'gnome-screensaver-command -l && sudo pm-suspend'

The sudo pm-suspend won't prompt you for password then.

Best Answer

Related Solutions

Ubuntu – screen is not locked after suspend/lid closed

Alternative (older answer, edited)

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