Here is a commandline workaround for the current lack of reasonable GUI configuration (and lack of sensible defaults):
gsettings set org.gnome.settings-daemon.plugins.power lid-close-ac-action 'nothing'
Per the "lack of sensible defaults" remark above, I'm also marking this bug as affecting gnome-settings-daemon; having the machine suspend on lid close when connected to power is an infuriating regression.
Here is a commandline workaround for the current lack of reasonable GUI configuration (and lack of sensible defaults):
gsettings set org.gnome. settings- daemon. plugins. power lid-close-ac-action 'nothing'
Per the "lack of sensible defaults" remark above, I'm also marking this bug as affecting gnome-settings- daemon; having the machine suspend on lid close when connected to power is an infuriating regression.