[Bug 202667] amdgpu fails to boot: atombios stuck executing D6A0

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=202667

--- Comment #6 from Dennis Wagelaar (dwagelaar at gmail.com) ---
Created attachment 281339
  --> https://bugzilla.kernel.org/attachment.cgi?id=281339&action=edit
journalctl --no-hostname -k for kernel-4.20.8-100.fc28.x86_64 with amdgpu.dc=1

Just found out changing stuff in /etc/modprobe.d/ has no effect until the next
run of dracut :$

It turns out I can no longer use amdgpu without DC=1. With that enabled, the
newer kernel run as normal.

What probably happened is that I saw the flicker once, which is mentioned here:
https://wiki.archlinux.org/index.php/AMDGPU : "If you experience flickering add
amdgpu.dc=0 to your kernel parameters." That's when trouble began.

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