[Bug 206175] Fedora >= 5.4 kernels instantly freeze on boot without producing any display output

[Linus Torvalds]

Dave, Alex,
 there's an odd bugreport on bugzilla, where Artem is seeing an odd
early-boot failure.

That one almost certainly has nothing to do with you guys, but see the
later odd (and apparently unrelated) report about some AMD graphics
firmware issue and a black screen.

                     Linus

On Tue, Jan 14, 2020 at 1:17 PM <bugzilla-daemon at bugzilla.kernel.org> wrote:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=206175
>
> --- Comment #9 from Matt Yates (matt at fast-mail.org) ---
> My BIOS vendor is "Insyde Corp.".  There is a TPM module.  When I disabled it,
> it caused my EFI boot entry to disappear, so I couldn't test it.
>
> However, I think we may have two separate problems.  I switched back from
> Fedora to Debian Testing, and the Debian installer upgraded the kernel from 5.3
> to 5.4 series prior to the first boot.  The 5.4 kernel booted up on first boot.
>  I could see boot messages scrolling, but the screen went to a black while
> trying to load lightdm because I did not have the "firmware-amd-graphics"
> package installed required for graphics.  After installing the amd graphics
> package, the 5.4 kernel freezes as before (right at the start of the boot
> process).  The 5.3 kernel boots as normal, and graphics work.
>
> The "firmware-amd-graphics" package (version 20190717-2) was the only thing I
> changed, so I guess the problem must be some sort of conflict with the amd
> graphics firmware and the 5.4 kernel.
>
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