### Orginal image download URL https://downloads.raspberrypi.org/raspios_full_armhf/images/raspios_full_armhf-2021-05-28/2021-05-07-raspios-buster-armhf-full.zip #### Modification request list - [x] screen rotation for xrandr,fbcon,lightdm - [x] Remove the wallpaper and change the solid color #202020 - [x] Install all rpi-related debs in the apt source #### Packages in devterm apt source 1. devterm-audio-patch (check whether the 3.5 audio interface is plugged in, pull up a certain GPIO) 1. devterm-fan-temp-daemon-rpi (detect the temperature of rpi, raise the io drive fan, written in python) 1. devterm-kernel-rpi (modified kernel, 4.x series) 1. devterm-keyboard-firmware (Devterm keyboard firmware flashing tool, Advanced users only!) 1. devterm-thermal-printer (thermal printer program and systemd scripts) 1. devterm-thermal-printer-cups (CUPS filter for the thermal printer, and add the thermal printer to cups, so devterm printer can be seen in chromium) ##### Add clockworkpi to apt source list see https://github.com/clockworkpi/apt/tree/main/debian ``` wget -O - https://raw.githubusercontent.com/clockworkpi/apt/main/debian/KEY.gpg | sudo apt-key add - echo "deb https://raw.githubusercontent.com/clockworkpi/apt/main/debian/ stable main" | sudo tee -a /etc/apt/sources.list.d/clockworkpi.list ``` ##### Config xrandr ``` sudo bash -c 'cat << EOF > etc/X11/Xsession.d/100custom_xrandr xrandr --output DSI-1 --rotate right EOF' ``` ##### Config lightdm in `/etc/lightdm/lightdm.conf` ``` greeter-setup-script=/etc/lightdm/setup.sh ``` *setup.sh* ``` #!/bin/bash xrandr --output DSI-1 --rotate right exit 0 ``` `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` Modify the `desktop_bg` color to `#202020` #### config.txt Add `dtparam=audio=on` to solve the problem of no sound card under HDMI ##### /etc/hostname to clockworkpi ##### /boot/cmdline.txt ,add fbcon=rotate:1, remove quiet ### Image download url https://forum.clockworkpi.com/t/devterm-os-cm3-image-files/7151/1