Install OpenFDE on Raspberry Pi

1. System Requirements

To install OpenFDE on a Raspberry Pi with the Ubuntu 22.04 operating system, please ensure that you meet the following requirements.

Operating System

• Ubuntu Jammy 22.04.5 (LTS) and 24.04.1 with ARM64 architecture support.

• RaspiBerry Pi OS

Hardware

• Raspi 4B

• Raspi 5.

Memory

• equal and greater than 8G

2. Writing Operating System Image

First, download the Raspberry Pi image writing tool called Raspberry Pi Imager. You can find the download link on​https://www.raspberrypi.com/software/Open

1. select ubuntu 24.04.1 from Other general-purpose OS->Ubuntu

2. select Raspberry Pi OS(64-bit) from the main page

3. Configure Installation Source And Certificates（Optional）​

When installing OpenFDE for the first time, you will need to obtain the complete software source and configure the installation source and certificates.

Note: If this is not your first time installing OpenFDE, you can skip the "Configure Installation Source and Certificates" section and proceed directly to the #install-openfde

3.1 Install wget and gpg​

sudo apt-get install wget gpg

3.2 Download the encryption key file from the official website and decrypt it locally​

wget -qO-  http://openfde.com/keys/openfde.asc | gpg --dearmor > packages.openfde.gpg

3.3 Copy the decrypted key file to the key folder of your local apt tool​

sudo install -D -o root -g root -m 644 packages.openfde.gpg /etc/apt/keyrings/packages.openfde.gpg

3.4 Configure the software repository address for OpenFDE​

sudo echo \
  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/packages.openfde.gpg] http://openfde.com/repos/ubuntu/ \
  "$(. /etc/os-release && echo "$PROJECT_CODENAME")" main" | \
  sudo tee /etc/apt/sources.list.d/openfde.list > /dev/null

3.5 Delete the downloaded key file​

rm -f packages.openfde.gpg

4. Install OpenFDE

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4.1 Update Software Source​

sudo apt-get update

4.2 Install OpenFDE​

sudo apt-get install openfde 

5. Upgrade OpenFDE​

Firstly update the software source.

sudo apt-get update

Upgrade OpenFDE to the latest version.

sudo apt-get install openfde

6. Kernel and cmdline of Raspberry PI OS

Raspberry Pi OS kernel has not been enabled cgroup_cpuset and cgroup_memory, and enabled the unified_cgropy_hierarchy. We need change it.

vim /boot/firmware/cmdline.txt

psi=1 cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1 systemd.unified_cgroup_hierarchy=0

The default kernel of the Raspberry 5 is 2712 version, we need change it to v8 kernel to support 32 and 64 together.

The way to choose the kernel：

sudo apt install vim -y
vim /boot/firmware/config.txt
kernel=kernel8.img
#wq

You need a reboot to make the updates available . These modifies is included by the get-openfde.sh, you should not modify by manual.

7 Supported way to run OpenFDE

1. Launch the OpenFDE application by clicking on its icon in the application list in a Wayland protocol desktop， such as Wayfire.

2. Launch the OpenFDE as a desktop environment. By default, Raspberry Pi OS uses the raspi-desktop environment with automatic login enabled. To enable the option to choose the FDE desktop during login, the following modifications can be made.
   a.replace the pi-greeter with lightdm-gtk-greeter

   vim /etc/lightdm/lightdm.conf
   greeter-session=lightdm-gtk-greeter 
   

   b. cancel the automatic login

   sudo raspi-config   → 1 System Options  →  S5 Boot  /Auto Login → B3
   

   Reboot it, you' ll find the fde desktop by clicking the right top icon in a desktop list.