I installed Ubuntu Server 22.04.3 LTS on an (old) iMac to use it in a headless capacity.
I want it to run with the lowest electricity usage possible, so I want the display to always be off, but I notice the screen is on a lot of the times I poke my nose in my server room.
I found this, related to making the boot screen sleep: https://askubuntu.com/a/1406141/168006 I added that and it does sleep sometimes, but later it is on (whether or not I log in on the "head")
There is no mouse connected, just a keyboard (and no input on that keyboard).
owen:~$ systemd-inhibit --list
WHO UID USER PID COMM WHAT WHY MODE
ModemManager 0 root 235936 ModemManager sleep ModemManager needs to reset devices delay
UPower 0 root 235929 upowerd sleep Pause device polling delay
Unattended Upgrades Shutdown 0 root 824 unattended-upgr shutdown Stop ongoing upgrades or perform upgrades before shutdown delay
I'm not quite sure how to interpret that. Is one of those items keeping the screen on? (How do I tell the duration of the delay?)
Is there something else I should check? Is there a way to just disable the screen entirely?
