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Hardware Support


Prepare SD card

Use GParted or any other tool to create the following EXT4 partitions:

  1. boot: Holds the mainline kernel Image and Device Tree files
  2. data: Holds the Sailfish OS rootFS

GParted will ask you to leave the first MB free of the SD card when creating the first partition, this is correct. This 1 MB will be used to store the U-boot boot loader.


We will now build the mainline U-boot boot loader from Git.

Clone U-boot (master branch):

You can find the U-boot mirror repository on Github:

git clone

Compile U-boot

You have to cross compile U-boot with the arm64 arch:

export CROSS_COMPILE=aarch64-linux-gnu-
ARCH=arm64 make clean
ARCH=arm64 make sopine_baseboard_defconfig
ARCH=arm64 make

The sopine_baseboard_defconfig is the same for the Don't Be Evil devkit.

Burn U-boot to your SD card

Copy the compiled U-boot bootloader to the first sector on your SD card:

sudo dd if=u-boot-sunxi-with-spl.bin of=/dev/sdX bs=8k seek=1

Manually loading the kernel

Serial TTY Baudrate over UART = 115200 for screen, example: screen /dev/ttyUSB0 115200 You have to start screen first, before turning on the devkit.

Interrupt the U-boot autoboot process when you see a message in the U-boot prompt. We need to access the U-boot prompt to load the Kernel image and boot it manually!

Kernel Image loading and Device Tree files:

ext4load mmc 0:1 ${kernel_addr_r} <IMAGE NAME> should be /Image
ext4load mmc 0:1 ${fdt_addr_r} /sun50i-a64-sopine-baseboard.dtb

Boot the kernel:

booti ${kernel_addr_r} - ${fdt_addr_r}

Automatic boot

Create a boot.cmd file:

echo Setting bootargs
setenv bootargs console=tty0 console=ttyS0,115200 root=/dev/mmcblk0p2 no_console_suspend rootwait 
earlycon=uart,mmio32,0x01c28000 panic=10 consoleblank=0 loglevel=1
echo Loading DTB
load mmc 0:1 ${fdt_addr_r} /sun50i-a64-dontbeevil.dtb
echo Loading kernel Image
load mmc 0:1 ${kernel_addr_r} /Image
echo Booting kernel NOW
booti ${kernel_addr_r} - ${fdt_addr_r}

Mount your boot partition and run the following command:

sudo mkimage -C none -A arm -T script -d /mnt/boot.cmd /mnt/boot.scr

This will translate the boot.cmd file into a U-boot script.


The PinePhone runs a mainline kernel, device tree modifications are done by all the PinePhone OS developers on Gitlab (

Clone the kernel

git clone
cd linux
git checkout pinephone-dontbeevil

Configure the kernel

  1. Copy our kernel config:
  2. Enter the linux project: cd linux
  3. Copy the config file to .config in the main directory

Build the kernel

We cross compile the kernel for ARM64. The LOCALVERSION variable can be used to add a version to the build.

Cross compile the kernel:

export ARCH=arm64
export CROSS_COMPILE=aarch64-linux-gnu-
export LOCALVERSION=-nemo
make clean
make oldconfig
make Image modules dtbs

Install the kernel modules in a different path:

make modules_install INSTALL_MOD_PATH=../linux_modules/

Install kernel

Copy the following things:

  1. Image from arch/arm64/boot/Image to the root of the boot partition.
  2. Device tree files from arch/arm64/boot/dts/allwinner/sun50i-a64-dontbeevil.dtb and arch/arm64/boot/dts/allwinner/sun50i-a64-dontbeevil.dts to the root of the boot partition.
  3. Modules from ../linux_modules to /lib/modules on the boot partition.

Nemo Mobile

Sailfish OS

Flash rootFS

You can download the latest rootFS from the Gitlab SailfishOS Porters CI: (see the artifacts of the latest CI job).

This tar.gz archive should be burned to the data partition of the SD card. It's important to burn it as the root user (not with sudo) to preserve extended attributes and ACLs:

sudo su

Unknown password

The Sailfish OS rootFS sets a random password when booting for the first time. You can only log in through the telnet debug interface. Since the eth0 interface still requires manually setup, you can't access telnet.

To circumvent this issue, you can login through the UART TTY interface. However you don't know the password of the root nor nemo users! To disable the root and nemo passwords, we can modify the /etc/shadow file:

sudo chmod +w <SD card data partition>/etc/shadow
sudo vim <SD card data partition>/etc/shadow # Remove any characters where <HASHED PASSWORD> is written: user1:<HASHED PASSWORD>:16092:0:99999:7:::.
sudo chmod -w <SD card data partition>/etc/shadow

By removing the hashed password, we can login with the user without entering a password. You can set a new password afterwards by running as a logged in user:


Init eth0

Enabling the eth0 interface has to be done manually for now:

ifconfig eth0 <YOUR_IP>
route add default gw <DEFAULT_GATEWAY_IP>
echo "nameserver <DNS_SERVER_IP>" > /etc/resolv.conf

Test your configuration with ping:

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