If you work on older Laptops and you use a Console only System Setup like on Debian there is a Bug on systemd and the console-setup package since years. After reboot all Font Settings seems gone. But the Settings are not real gone, cause systemd does not pull the settings on boot!
How to fix?
- edit the crontab of root by
sudo su - crontab -e
- insert the /bin/setupcon command on „@reboot“ means on every boot!
@reboot /bin/setupcon > /dev/null 2>&1
- save and exit, reboot now
- now the PC should echo big Fonts for old eyes „Terminus 20×12 Frambuffermode“