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Arch Linux themselves only provide a .tar.gz. If you want an easy .IMG to burn to and SD card using Etcher or Win32diskimager, here are .IMG files on sourceforge for the various Pi models: Raspberry Pi Zero Raspberry Pi 2 and 3 Raspberry Pi 4


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A little research reveals that the RPI4 is using the dual band wifi-chipset Cypress CYW43455. I assume the chipset must be initialized in the early userland to work properly. After encrypting the root partition the drivers can't be accessed from the early user space. To solve this you have to add the missing driver to the initramfs as files or preferably as ...


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is there a possibility to read information trough the serial device even if there is no boot device? Yes! It is possible since Raspberry Pi 4B. The RPi 4B comes with an EEPROM containing the boot loader and that is reprogramable. Have a look at Raspberry Pi 4 boot EEPROM. There you can set a debug flag BOOT_UART=1 as described at Pi4 Bootloader ...


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@goldilock's answer provides a good overview for debugging boot issues. However, to answer the question of: So, is there a possibility to read information trough the serial device even if there is no boot device? This would generally be done through JTAG, using a hardware debugger. This provides capabilities such as reading memory and register values, ...


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is there a possibility to read information trough the serial device even if there is no boot device? See Ingo's answer -- which may or may not provide useful information in the context of your question. I would expect there to be some way other than connecting a screen to figure out that the device is not booting and why. This kind of circumvents the ...


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