Add display mode tricks to boot config

docs/finalize_setup.md

@@ -14,6 +14,27 @@ sudo -sHu root /bin/bash
 touch /etc/cloud/cloud-init.disabled
 nano -w /boot/firmware/cmdline.txt
     remove console=tty1
+
+# Setup screen resolution (UNCOMMENT THE RIGHT LINES!!!)
+cat >> /boot/firmware/usercfg.txt <<EOF
+
+# Further reading
+# https://www.raspberrypi.org/documentation/configuration/config-txt/video.md
+# https://www.raspberrypi.org/forums/viewtopic.php?t=5851
+# https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=24679
+
+# GeeekPi 5 Inch Capacitive Touch Screen 800x480 HDMI Monitor
+#hdmi_group=2
+#hdmi_mode=87
+#hdmi_cvt=800 480 60 6 0 0 0
+
+# Generic 2k
+#hdmi_cvt=2560 1600 50 5 0 0 1
+#hdmi_group=2
+#hdmi_mode=88
+EOF
+
+# Reboot to pickup changes
 systemctl reboot
 
 # Login