Black screen after GRUB on AMD desktop with all kernels later than 6.2.15 on F37 and F38; (no nvidia; KVM switch in use)

[blindcant (bc)]

@py0xc3

I can reopen it if you want

I don’t think that is necessary, I get the feeling it is an AMD regression not a Fedora one.

@py0xc3

F37 is close to its end of life

Yeah that is my concern, I’d like to get this sorted before Fedora 37 is EOL.

@py0xc3

Also, we do not know if the kernel contains the bug or if it only calls
the bug

Yeah that is true, I am trying to follow Bisecting Fedora kernel – Kparal's Fedora Blog and I’ve found kernel-6.2.15-200.fc37 | Build Info | koji is kernel-6.2.15-200.fc37 which I am currently using and the next successful build that is available is kernel-6.3.3-100.fc37 | Build Info | koji for kernel kernel-6.3.3-100.fc37. I built that and booted into it and it has the issue I am talking about. I did a kernel bisect on the Fedora kernel code base on the f37 branch and it pointed to kernel-6.2.16-200.fc37 | Build Info | koji kernel kernel-6.2.16-200.fc37 but that build was deleted. What I am trying to work out is how to find the generic Linux kernel code base (git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git) commit hashes for kernel-6.2.15-200.fc37, kernel-6.2.16-200.fc37, and kernel-6.3.3-100.fc37 so I can do the kernel bisect on that.

@py0xc3

The first question at this point is: can upgrading to F38 solve your
issue?

I think it will only work with my KVM if I downgrade the kernel to kernel-6.2.15-300.fc38 | Build Info | koji which is the last working kernel for me.

@py0xc3

I am not sure why you still work with F37, but the two major
reasons of users are to update only once per year or to have the most
deeply tested Fedora.

Yeah I like to be n-1 so it is more tested and less bugs. I used to always stay up to date but then I found a lot of Gnome extensions that I use got broken for a few weeks so I decided to go n-1.

@py0xc3

You have tested the current kernel release
6.4.11 ? And it does not work as well?

Correct, no kernel above 6.2.15 and my KVM gives any video output after BIOS and GRUB. If I remove the KVM I get video output, but I need that connected to make working from home easy.

@py0xc3

Unfortunately, my capabilities to support here are currently a little
limited, so if the issue persists with 6.4.11, my advice is to upgrade
to F38.

Thank you for your time and help so far. I could do the upgrade and then downgrade to the working kernel. Worst case scenario I have to unplug my DisplayPort cable from the KVM and plug it in directly. But switching the cable between my desktop and work laptop will be annoying.

@py0xc3

Maybe your ticket at /drm/amd makes a difference, but be aware that it
can end up the same way because on one hand, F37 is end of life soon,
and on the other hand, it is not yet clear if that is an upstream issue.

Yeah that is why I am trying to do the kernel bisect to see if it is an AMD issue, which at this point I suspect it is since it hasn’t been fixed in any 6.3 or 6.4 kernel. I’ve tried all of them with and got the same result, no video output after BIOS and GRUB.