Hey. Short story: I activated Secure boot on my MSI Mainboard and bootet in my new Debian. I realized that I had no wired internet connection and rebooted the system to deactivate secure boot again. Problem is that now my whole Ethernet is borked? I don’t get a connection in Debian or my older OpenSuse partition and the Debian install USB stick says that the connection doesn’t work. Of course I deinstallieren Windows and now this happens. Tried already a different cable . Any idea what I could do?
Interesting typo. Puts your default language to german. :)
But to answer your question: There are two not uncommon things I‘d like you to rule out.
If both are ruled out, check if the network adapter is showing „up“ or working condition even without the cable.
I‘ve had a situation where my network adapter was „down“ because I installed it later and the installation (ubuntu in my case) didn’t know it and when I rebooted it defaultet to eth2 instead of eth0 or something.
Good luck.