Boot lockups on PowerMac G5 with installer images

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hello,

just as a heads-up: We still don't know what the underlying problem of
the lockup on PowerMac G5 systems is when trying to boot the latest
installer images.

All I know so far is that the problem can be reproduced on QEMU and the
last working image is image created 2023-06-18:

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

All newer images (snapshots) just hang after the kernel has been initialized.

Adrian

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