Installing ethercat repositories

Hello, First of my name is Samuel and I am completely new to the whole Linux enviroment but want to learn the process. I am experiencing some issues that I can go through whole setup process and everything is fine but the whole thing falls apart only when the sudo apt update followed by sudo apt upgrade messes everything up. And by evertyhing I mean I lose my link to mac address and some dependenciy files fail to complete and are left unconfigured. 
 What am i doing wrong I've MrRodW install and SZolkaa install and get the same result.

Below is what is not completing. Thanks again.

dpkg: error processing package linux-headers-rt-amd64 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 linux-image-6.12.86+deb13-rt-amd64
 linux-image-rt-amd64
 linux-headers-6.12.86+deb13-rt-amd64
 linux-headers-rt-amd64
Error: Sub-process /usr/bin/dpkg returned an error code (1)

 

That is not the issue, it is the result of the issue, see if there is "raspi" mentioned in the error report.

tommylight wrote:

That is not the issue, it is the result of the issue, see if there is "raspi" mentioned in the error report.

Kernel 6.12 is Debian Trixie and thankfully Debian fixed the Raspi issue on its release, so its not the issue.

I suspect its an EFI issue installing dkms. EFI/Secure boot prevents untrusted things from modifying the kernel and dkms does exactly that.
There is a spoiler in the very first post about how to fix this where you tell EFI that dkms can be trusted. Alternatively, consider disabling secure boot in the BIOS

Thanks
 

Hello dear,
mokutil --sb-state says that EFI variables are not supported on this system. And it doesnt want to install linuxcnc-ethercat. The same dpkg error is shown. I do not know what to do...

Try enabling UEFI in BIOS.