Boot failure with ppc64 port on iMacs G5

[John Paul Adrian Glaubitz]

Hi Michael,

On Thu, 2024-02-29 at 17:42 +1100, Michael Ellerman wrote:
> > There seems to be a regression in the kernel which affects PowerPC 970 machines,
> > i.e. PowerMac G5 CPUs. The issue needs to be bisected and reported upstream.
> 
> I have a quad G5 that is booting mainline happily.

it's a really tricky problem because it seems to depend on how the kernel image
is booted.

It fails when trying to boot the kernel off the installation CD, i.e. like from here:

> https://cdimage.debian.org/cdimage/ports/snapshots/2024-02-25/debian-12.0.0-ppc64-NETINST-1.iso

but the kernel will boot fine when installing in an existing system which was installed
with an installation CD which uses an older kernel.

> https://cdimage.debian.org/cdimage/ports/snapshots/2023-06-18/debian-12.0.0-ppc64-NETINST-1.iso

I have not really figured out yet what the problem is.

Adrian

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