screen turns off at login screen after 1 minute (W10 1709) (+ solution).

[William Gaatjes]

After the 1709 update, i noticed my login screen ( called console) dissappears after 1 minute of idle and my monitor powers down.
As it turns out, for some reason my default power management settings had been overriden with new settings.
I had to change it all back , but i could not find the option to prevent the log in screen power save feature.

Console lock display off timeout is the amount of minutes Windows will wait idle with no activity while on the lock screen before timing out and automatically turning off the display.

Luckily, this is a feature since windows 8 and it is hidden for some reason by microsoft.
But these guys explain how to get the option in the advanced power management settings.
https://www.eightforums.com/tutorials/8267-power-options-add-console-lock-display-off-timeout.html

I had to go in the registry to turn the option on by setting the registry setting attributes to value 2.
It had value 1.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\7516b95f-f776-4464-8c53-06167f40cc99\8EC4B3A5-6868-48c2-BE75-4F3044BE88A7

Attributes DWORD

1 = Hide "Console lock display off timeout"
2 = Show "Console lock display off timeout"

After saving, there was an extra option in the advanced power management settings to disable the power save feature.

Giving the timeout the value 0 disables this feature.
My console now stays on.