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Bug#1033058: Booting mini.iso : kernel hangs on ppc64el



Hi Cyril!

> Could you please guide me into reproducing this issue in QEMU? #987368
> had hints, but at least the openpower.xyz part no longer works (it's no
> longer resolving).

much simpler actually because in the current case, we won't emulate a
full baremetal PowerNV machine.
For example, using this mini.iso from http://d-i.debian.org/daily-images/ppc64el/daily/netboot/mini.iso
you can just try those 2 cases  (from an x86 machine or other) :

---
$ qemu-system-ppc64le -nographic -nodefaults -serial mon:stdio -cdrom /tmp/mini.iso
---
here we just start a ppc64le vm with no graphic card, and boot the iso.
You should reach the debian installer menu on the serial console in your
terminal (if you want to go further, provide a disk file for example).

But if you try a vm with a graphic card like so :
---
qemu-system-ppc64le  -cdrom /tmp/mini.iso
---

You'll see you won't have the d-i menu displayed on the default
graphical output.
Not sure the pointed patch is at fault, but at least it emphasis some
issue in the installer environment in the context of a framebuffer
display in qemu.
I see the installer media gets build from a kernel-image udeb which I
guess provides a different kernel runtime env from the machine installed
with linux-image on disk (which works).


F.

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