Comment 3 for bug 1907687

Here is some additional info

root@imac-XPS-13-9365:~# systemd-inhibit
WHO UID USER PID COMM WHAT WHY MODE
ModemManager 0 root 1257 ModemManager sleep ModemManager needs to reset devices delay
NetworkManager 0 root 1093 NetworkManager sleep NetworkManager needs to turn off networks delay
UPower 0 root 1399 upowerd sleep Pause device polling delay
Unattended Upgrades Shutdown 0 root 1300 unattended-upgr shutdown Stop ongoing upgrades or perform upgrades before shutdown delay
GNOME Shell 1000 imac 3080 gnome-shell sleep GNOME needs to lock the screen delay
imac 1000 imac 3221 gsd-power handle-lid-switch External monitor attached or configuration changed recently block
imac 1000 imac 3215 gsd-media-keys handle-power-key:handle-suspend-key:handle-hibernate-key GNOME handling keypresses block
imac 1000 imac 3215 gsd-media-keys sleep GNOME handling keypresses delay