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HCL:Raspberry Pi4

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Raspberry Pi 4

The Raspberry Pi 4 is a credit-card sized computer that plugs into your TV and a keyboard. It’s a capable little PC which can be used for many of the things that your desktop PC does, like spreadsheets, word-processing and games. It also plays high-definition video.

Technical Data

  • Broadcom BCM2711 SoC
    • 4x ARM Cortex-A72 CPU @ 1.5GHz.
  • RAM: 1 - 8 GB LPDDR4-2400 SDRAM (depending on model)
  • Gigabit Ethernet
  • WiFi – 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless
  • Bluetooth 5.0, BLE
  • USB: 2x USB 3.0 ports; 2x USB 2.0 ports
  • 40-pin connector also see Using The Header

openSUSE in Raspberry Pi 4

Writing a disk image to a USB stick or a SD card

  1. Download the image you want (Leap is stable, Tumbleweed is rolling) from here. Make a choice of desktops:
    JeOS - Just enough Operating System - a very basic system, no graphical desktop
    E20 - Enlightenment desktop
    XFCE - XFCE desktop
    KDE - KDE desktop
    LXQT - LXQT desktop
    X11 - basic X11 system
    Susemini.png
    Version:
    Tumbleweed
    JeOS image E20 image XFCE image LXQT image KDE image X11 image

    If the direct links above do not work for you (as we are constantly building new images), please check the general download directory for the images.


    Susemini.png
    Version:
    Leap-15.2
    JeOS image E20 image XFCE image LXQT image KDE image X11 image

    If the direct links above do not work for you (as we are constantly building new images), please check the general download directory for the images.

  2. As root extract the image onto your SD card (replace sdX with the device name of your SD card).
    WARNING: all previous data on the SD card will be lost. Check first if the device you have selected is really your SD card!
     xzcat [image].raw.xz | dd bs=4M of=/dev/sdX iflag=fullblock oflag=direct status=progress; sync
  3. Insert the SD card with the openSUSE image into your board.
  4. Connect the board to your PC via serial port (optional, but helpful for debugging; USB-TTL serial cable needed).
  5. Connect the board to your monitor (via DVI/HDMI, optional).
  6. Power on the board.
  7. Walk through the first boot steps.
  8. Ethernet is configured to request an IP via DHCP, check your DHCP server for the board IP if used.
  9. Have a lot of fun...
Default login is root:linux, works on serial console, via ssh, GUI.

Installing openSUSE using an ISO (advanced)

It is possible to directly install from the DVD ISO, or the NET ISO, on Raspberry Pi 4.

A USB key (that can contains the DVD) and an empty SD card (at least 16GB) are needed.

The ISO (DVD and NET images) are able to boot on the Raspberry Pi. So, you just need to copy the image to an USB stick, plug it in the RPi and follow instructions from HCL:AArch64_EFI

Known issues

No sound

The following features are not working yet:

  • No sound via jack or HDMI (should land with kernel 5.10), but: boo#1177169

DSI output not supported by VC4 driver

DSI output used for some LCD panels (using the flat cable) is not yet supported by the VC4 driver.
To use this video output, please use the EFI framebuffer by replacing:

dtoverlay=vc4-kms-v3d,cma-default

with:

dtoverlay=disable-vc4

in /boot/efi/config.txt

More details on boo#1181683 and https://github.com/raspberrypi/linux/issues/4020

Troubleshooting

No kernel output on serial or HDMI

If you don't see kernel output on serial or HDMI, you can try setting the kernel boot parameter to

 earlycon=uart8250,mmio32,0xfe215040 

Beware that if you want to load the kernel directly from the firmware (not via grub or U-Boot) you will need to set gpu_freq=500 in config.txt

LED warning flash codes

If a Pi 4 fails to boot for some reason an LED will blink a specific number of times to indicate what happened. The codes are described here.

Recent versions of Pi 4 firmware can also display error messages in the serial or HDMI if connected.

RPi does not boot from USB

Ensure that you have the latest firmware to boot from USB.

To update your EEPROM firmware check the official documentation.

Headless server

If HDMI is not connected, Pi 4 cannot boot. You need to add hdmi_force_hotplug=1 to /boot/efi/config.txt (this solution is found on Fedora Forum and later tested on openSUSE).

See also