prevent pi4 hdmi shutdown while printing
Well, really I'd like to prevent it from going into power save mode/screen blanking in general, but mostly during prints.
I tried following the directions in http://raspberrypi.stackexchange.com/questions/47229/ddg#100347 though now it's an all black screen instead of powered off, so there must be something else that I'm missing.
Raspberry Pi Stack Exchange
How configure Xorg to disable DPMS completly on linux w/ SATO desktop
Using the Raspberry Pi 3
My Linux
It's a Yocto image with Sato desktop
root@raspberrypi3:~# lsb_release -a
LSB Version: core-4.1-noarch:core-4.1-arm
Distributor ID: poky
Description: Poky ...
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