[Linux] “0.107 No irq handler for vector” aka “Problems with my PCIe Port”

As you may have already guessed, I was currently building a new Kernel for my PC (a md8818), and while doing so I encountered a strange problem, which I didn’t quite understand.

Of course, first thing to do is to ask Google, and I found out that I wasn’t the only one having that trouble, but it also seems like no one really had a solution to it (except for suppressing the symptoms). It took me 11 Kernel builds, until I finally eliminated the problem, so to help you not go through all this mess yourself, I’d like to present the problem plus solution.

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