Is there a way to turn off the screen on Truenas Scale?

TrueNAS General
6

Seeing as this is already janky, I’m not going to comment on the setup :P.

Your options are as follows:
setterm --blank 1 – Will turn off the display after 60 seconds of inactivity, needs a user to be logged in. Recommended See below why this is not recommended.

consoleblank=60 kernel parameter – Will turn off the display after 60 seconds of inactivity, does not require a user to be logged in. I really can not recommend messing around with grub config but I’m not going to tell you explicitly not to do it.

EDIT: Actually have been poking around, you should be able to set the kernel parameter like so:
midclt call system.advanced.update '{ "kernel_extra_options": "consoleblank=60" }'

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