Option to disable any unconfigured output screen

[exodist]

I would like a config options like one of these:

enable_unknown_outputs true # default, current behavior
enable_unknown_outputs false # New behavior

Currently Niri will automatically enable any monitor it finds, even if it is not configured in config.kdl. This is a perfectly reasonable and sane default. This may not however always be desired.

Gotcha

Will need to make sure that at least 1 screen is always turned on, even if it is not configured when this option is set to false. Would not want to end up with no outputs.

My use case:

I have an AMD gpu that causes OOMs when connected to multiple monitors while idle and screens off. So if I lock my screen and leave for ~6 hours I will come back to find everything has been closed by the OOM killer. This is a known issue with AMD cards, and is not a niri issue. There was a kernel fix, but it added new bugs and was reverted.

Anyway, I have a fix where my lock script is this:

#!/usr/bin/sh
ln -sf /home/exodist/.config/niri/screens_locked.kdl /home/exodist/.config/niri/screens.kdl
dms ipc call lock lock &
niri msg action power-off-monitors &

sleep 2;

while [ 1 ]; do
    if [ `dms ipc call lock isLocked` = 'false' ]; then
        ln -sf /home/exodist/.config/niri/screens_unlocked.kdl /home/exodist/.config/niri/screens.kdl
        exit 0;
    fi
    sleep 1;
done

And it works. Problem is I move between multiple docking stations, and I also sometimes use various external monitors.

Currently I have to add a section to mt screens_locked.kdl for every monitor I want to turn off. If I end up on a dock I have not been on before, or a new external monitor, I need to add a section. This is tedious. I would prefer if I could configure screens_locked.kdl to just disable any unconfigured monitor, and list only the main one as being on.