## Intro The image based on raspberry pi os for raspberry pi cm4 with devterm cm4 adapter and it is better to run a Ubuntu 21.04 in a VirtualBox to do all the jobs The entire operation requires a certain experience in linux be careful ## Start a chroot env ```bash wget https://downloads.raspberrypi.org/raspios_full_armhf/images/raspios_full_armhf-2021-05-28/2021-05-07-raspios-buster-armhf-full.zip unzip 2021-05-07-raspios-buster-armhf-full.zip sudo losetup --show -f -P 2021-05-07-raspios-buster-armhf-full.img #assume loop0 sudo mount /dev/loop0p2 /mnt/p2 sudo mount /dev/loop0p1 /mnt/p2/boot cd /mnt/p2 sudo mount --bind /dev dev/ sudo mount --bind /sys sys/ sudo mount --bind /proc proc/ sudo mount --bind /dev/pts dev/pts #sudo mv etc/ld.so.preload etc/ld_so_preload sudo chroot . ``` ## Inside chroot ```bash curl https://raw.githubusercontent.com/clockworkpi/apt/main/debian/KEY.gpg | sudo tee /etc/apt/trusted.gpg.d/clockworkpi.asc echo "deb https://raw.githubusercontent.com/clockworkpi/apt/main/debian/ stable main" | sudo tee -a /etc/apt/sources.list.d/clockworkpi.list sudo apt update && sudo apt install devterm-thermal-printer-cm4 devterm-fan-temp-daemon-cm4 devterm-kernel-cm4-rpi devterm-audio-patch devterm-wiringpi-cm4-cpi -y sudo apt install -y devterm-thermal-printer-cups ``` **Config xrandr** ``` sudo bash -c 'cat << EOF > etc/X11/Xsession.d/100custom_xrandr xrandr --output DSI-1 --rotate right EOF' ``` **config lightdm** `/etc/lightdm/lightdm.conf` `greeter-setup-script=/etc/lightdm/setup.sh` ``` sudo bash -c 'cat </etc/lightdm/setup.sh #!/bin/bash xrandr --output DSI-1 --rotate right exit 0 EOF' ``` `sudo chmod +x /etc/lightdm/setup.sh` **Modify /etc/dphys-swapfile** ``` CONF_SWAPSIZE=512 ``` **Change the default wallpaper** The following files changed * /etc/xdg/pcmanfm/LXDE-pi/desktop-items-0.conf * /etc/xdg/pcmanfm/LXDE-pi/desktop-items-1.conf * /etc/lightdm/pi-greeter.conf * /home/pi/.config/pcmanfm/LXDE-pi/desktop-items-0.conf Delete wallpaper address `temple.jpg`,change the `desktop_bg` color to `#202020` change `/etc/hostname` to clockworkpi in `/boot/cmdline.txt` ,add `fbcon=rotate:1`, remove `quiet` **Screen rotation** change ``` /etc/skel/.config/monitors.xml /home/{pi,rpi-first-boot-wizard}/.config/monitors.xml ``` to be like ```xml 0 0 yes DSI-1 unknown unknown unknown 480 1280 60.000 right ``` for uConsole, replace **480 to 720** in above **monitors.xml** ### console rotation /boot/cmdline.txt add **fbcon=rotate:1** in the end of ``` console=......... fbcon=rotate:1 ``` ### Now quit the chroot env ```bash exit #sudo mv etc/ld_so_preload etc/ld.so.preload sudo umount /mnt/p2/dev/pts sudo umount /mnt/p2/dev sudo umount /mnt/p2/proc sudo umount /mnt/p2/sys ##clear bash sudo rm -rf root/.bash_history #sudo rm usr/bin/qemu-arm-static cd - sudo umount /mnt/p2/boot sudo umount /mnt/p2 sudo losetup -D /dev/loop0 #assume loop0 ``` ### Flash the image to SD card * Linux `sudo dd if=2021-05-07-raspios-buster-armhf-full.img of=/dev/sdX bs=8M status=progress`