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# systecmtl start rpi-led-pwr.service # systemctl start rpi-led-pwr.service

How to setup Debian 11 on Raspberry Pi 4

In this article, I'd like to discuss how I setup Debian 11 on Raspberry Pi 4

Raspberry Pi 4 is a small logic board with Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC (System on a Chip).

You can get it with 2GB, 4GB or even 8GB of Memory. I'm using Raspberry Pi 4 with 8G of memory with 32G microSD Card.

System Requirements

Here is basic System Requirements for this article.

+ Raspberry Pi 4 (4G or 8G)
+ microSD Card (32G or higher)
+ Case for Raspberry Pi 4

Download Raspberry Pi 4 Image

You can download RPI 4(4G) Verified Image for Bullseye from https://raspi.debian.net/tested-images/

$ sudo apt update
$ sudo apt install curl wget
$ wget https://raspi.debian.net/verified/20210823_raspi_4_bullseye.img.xz

Write the image to microSD Card

Please refer to following document to write the image to microSD Card for Linux-based. https://wiki.debian.org/RaspberryPiImages

If you have macOS, use balenaEtcher https://www.balena.io/etcher/

Boot Raspberry Pi 4 with microSD

At this point, I've already assembled Raspberry Pi 4 on its own Case and plugin to a Display via HDMI and wireless Keyboard and Mouse Combo.

Plugin microSD to Raspberry Pi 4 and boot from it.

The default username is root without password (set it to your own)

Case for Raspberry Pi 4

There are lots of Cases available for Raspberry Pi 4. I wanted a Aluminum Case with built-in Fan so I picked:

Argon ONE V2 Case for Raspberry Pi 4

They also provide a script to control fan.

$ curl https://download.argon40.com/argon1.sh | bash
...
The following additional packages will be installed:
  rpi.gpio-common
The following NEW packages will be installed:
  python3-rpi.gpio rpi.gpio-common
...
The following additional packages will be installed:
  i2c-tools libi2c0 read-edid
Suggested packages:
  libi2c-dev python-smbus
The following NEW packages will be installed:
  i2c-tools libi2c0 python3-smbus read-edid
...
***************************
Argon One Setup Completed.
***************************

You may need to reboot for changes to take effect

Use argonone-config to configure fan
Use argonone-uninstall to uninstall

$ argonone-config
--------------------------------------
Argon One Fan Speed Configuration Tool
--------------------------------------
WARNING: This will remove existing configuration.
Press Y to continue:Y
Thank you.

Select fan mode:
  1. Always on
  2. Adjust to temperatures (55C, 60C, and 65C)
  3. Customize behavior
  4. Cancel
NOTE: You can also edit /etc/argononed.conf directly
Enter Number (1-4):1

Fan always on.

Remote Login to Raspberry Pi 4

To remote login (ssh) to RPI4, I would recommend to create your own account.

# adduser tchung
# passwd tchung

I also recommend to install vim and sudo.

# apt update
# apt install vim
# update-alternatives --config editor (choose vim.basic)
# apt install sudo
# adduser tchung sudo

logout and login as yourself

Neofech on Raspberry Pi 4

I always install neofetch on new system for login script

$ sudo apt install neofetch
$ echo; neofetch --ascii_colors 1 1 1 1 1 1

Here is result.

rpi4-d11-neofetch.png

Removing Black Border for RPI4

To remove the Black Border around the screen, add following line in the config.txt and reboot.

$ sudo vi /boot/firmware/config.txt
disable_overscan=1

Control Power LED for RPI4

If your RPI4 Power LED stopped working after installing Daily Build Image, you can create following systemd service.

# vi /etc/systemd/system/rpi-led-pwr.service
  
[Unit]
Description=Control Raspberry Pi PWR (power) LED

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=sh -c "echo 1 > /sys/class/leds/PWR/brightness"
ExecStop=sh -c "echo 0 > /sys/class/leds/PWR/brightness"

[Install]
WantedBy=multi-user.target

# systemctl daemon-reload
# systemctl enable rpi-led-pwr.service
# systemctl start rpi-led-pwr.service

More Information

Here is more information from RPI4:

$ sudo apt install lsb-release
$ lsb_release -d
Description:    Debian GNU/Linux 11 (bullseye)

$ uname -a
Linux rpi4-20210823 5.10.0-8-arm64 #1 SMP Debian 5.10.46-5 (2021-09-23) aarch64 GNU/Linux

$ lscpu | egrep 'Arch|CPU|Byte|Vendor|Model'
Architecture:                    aarch64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
CPU(s):                          4
On-line CPU(s) list:             0-3
Vendor ID:                       ARM
Model:                           3
Model name:                      Cortex-A72
CPU max MHz:                     1500.0000
CPU min MHz:                     600.0000
NUMA node0 CPU(s):               0-3

$ df -hT   
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  3.8G     0  3.8G   0% /dev
tmpfs          tmpfs     781M  644K  781M   1% /run
/dev/mmcblk1p2 ext4       30G  965M   27G   4% /
tmpfs          tmpfs     3.9G     0  3.9G   0% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
/dev/mmcblk1p1 vfat      296M   75M  222M  26% /boot/firmware
tmpfs          tmpfs     781M     0  781M   0% /run/user/1000

$ free -hw
               total        used        free      shared     buffers       cache   available
Mem:           7.6Gi        89Mi       7.1Gi       0.0Ki        12Mi       399Mi       7.3Gi
Swap:             0B          0B          0B