When I start the computer, I'm logging in directly at the username: prompt. I am not launching any XDE.
How can I either completely disable the screen from shutting off, or increase the timeout to a sufficiently long time?
The only instructions I have been able to find are for various XDEs like Gnome, etc.
You can disable the screen blanking with setterm -blank 0.
Put this into /etc/rc.d/rc.local, make sure that file is executable and then start and enable the rc-local service:
systemctl enable rc-local
systemctl start rc-local
Another option would be to add consoleblank=0 to the kernel parameter in your grub configuration.
