I'm using Arch Linux + GNOME3 on desktop, and when the system starts or the user logs out, gdm displays the login screen for about 20 seconds and then turns off the display (although the computer is still running). Is it possible to disable this? I want the monitor to keep displaying the login screen forever. I couldn't find any way to configure this.
Disable GDM suspend on lock screen
gnome3;gdm3
That's because of the idle-delay setting. To change it you'll have to alter the corresponding dconf key (and do that as the gdm user):switch to a VT (e.g. Ctrl+Alt+F3), login as root and run:su - gdm -s /bin/shto switch user to gdm.then run:export $(dbus-launch)and set idle delay to 0 (which translates to never):GSETTINGS_BACKEND=dconf gsettings set org.gnome.desktop.session idle-delay 0run exit or hit Ctrl+D to return to root account.reboot your machine or restart the display manager:systemctl restart gdm