GNOME: disable sleep on lid close
Install GNOME Tweak Tool and go to the Power section. There's an option to disable the automatic suspend on lid close.
dconf before and after to find the option, but it turns out that's not how it's implemented. Instead, Tweak Tool creates
~/.config/autostart/ignore-lid-switch-tweak.desktop. The autostart is a script which effectively runs
systemd-inhibit --what=handle-lid-switch. So we can see the lid close action is handled purely by systemd-logind.
An alternative would be to edit
/etc/systemd/logind.conf to include:
This would work all the time, not just when your user is logged in.
Unfortunately, the inhibitor routes didn't seem to work as advertised for me on openSUSE Tumbleweed (42.1) using GNOME. But, I had success with Systemd masking:
systemctl mask sleep.target suspend.target
To undo the mask, you can use
systemctl unmask sleep.target suspend.target
I had solved this issue once before, but apparently recent versions of Fedora (so far from
33, inclusive), require two entries now, whereas before only one was required. So:
user$ sudo vi /etc/systemd/logind.conf HandleLidSwitch=ignore <---- Set both of these HandleLidSwitchDocked=ignore <---- to ignore lid events. user$ sudo systemctl restart systemd-logind
EDIT: As mentioned by commenters below, you might want to just reboot after making the edits.