Don't sleep while external display is plugged in

I agree with this report, but I believe this is hard coded in the GNOME power manager now. I don't think we have control over what happens when you close the lid

At least should be possible to choose what to do when the lid closes. Why did that option disappeared?

Hello Pedro,
Just to inform you this feature was removed because the software who did the action was removed.
This software was not in our control. So we couldn't do anything about it.
After some time some a new software project has added these features.
It is added to systemd. i am currently working on it to get it back.
 even the option to set the dock/ external screen behavior when closing the lid.

The current default behaviour on Loki builds with my Thinkpad in the docking station is exactly the desired behaviour.
When I close the lid the built in screen gets turned off and only the external screens are active. If I disconnect everything and close the lid the laptop goes to sleep. The correct dconf key to disable this behaviour is org.gnome.settings-daemon.plugins.power.lid-close-suspend-with-external-monitor. However toggeling that setting does not work, it's either a bug in GSD or they removed that feature.

fabian it isn't a bug of GSD . it is because ubuntu switched to systemd which takes over the ACPID handling. it isn't a bug because other distro's haven't switched to systemd yet. specially arch and debain distro's can still have sysv.