I just did the most recent 6.7.1 kernel update and have the same problem that the system presents a black screen after selecting my normal zen kernel. However the zen-fallback (also 6.7.1) kernel works and can boot. My bios was already set to UEFI whole time, so the CSM option is disabled.
I noticed that the normal boot isnt starting KDE and has a lot of WARNING: CPU: 0 PID: 494 at drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c:622 amdgpu_irq_put+0xf3/0x120 [amdgpu] warnings.
The only differences I did than usual with this kernel update was refusing a pacnew version of /etc/passwd that tried to only write root into the passwd and remove every other user.
Rolling back to zen-6.6.10 did not help. And I also have the same problem with the non fallback linux kernel too. I dont really get what i fucked up here. For both kernels the system only boots normally if I use the fallback option.
I changed to another arch based distro as I got fed up trying to solve the same issue a few times after updates. First few tries I ended up wasting days with no fix and then just reinstalling EOS. Last time this happened I was not going to waste days again. Reluctantly distro-hopped, especially as EOS was good, all has been ok this far.
I am glad rolling back worked as it did not work for me.
After searching all the threads to this current issue nothing worked… EXCEPT disabling CSM.
It was enabled in my BIOS and EOS could also boot up until my update yesterday.
I tried chroot updating, reinstall-kernels, bootctl install, removing non-lts kernel… the only thing that worked was disabling this setting… thank you very much!
Yes, I remember when this fix saved my machines.
This person, member of the forum → ainz is a very important and knowledgeable contributor.
A treasure for us the users.
