[Bug 1847806] Re: eoan: ppc64el install on pseries-eoan VM fails to install

[Christian Ehrhardt ]

The most likely theory that matches the above results would be that:
1. glibc in Eoan has some "if P9, then new code"
2. qemu TCG for ppc64el fails on that new code

TCG never was very important (it always is best effort and non production use), and users seem to have a workaround by configuring former machine types or explicitly a power8 cpu type.
=> Prio: low.


OTOH we could patch qemu in Eoan (needs to be done super fast thou) to default to P8 cpu on the pseries-eoan type. IMHO we need IBM to guide us on this.

Question- at IBM:
a) do you want us to switch the default emulated CPU to from power9_v2.0 to power8_v2.0 (If so we need the answer asap)?
b) are there known missing/bad instructions in P9-TCG that we should fix by backporting changes?

** Changed in: qemu (Ubuntu)
   Importance: Undecided => Low

** Changed in: qemu (Ubuntu)
       Status: New => Confirmed

** Also affects: glibc (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  eoan: ppc64el install on pseries-eoan VM fails to install

Status in The Ubuntu-power-systems project:
  Incomplete
Status in debian-installer package in Ubuntu:
  Invalid
Status in glibc package in Ubuntu:
  New
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  Using today's ppc64el server iso, I tried to install this on a
  pseries-eoan VM hosted on a large x86 desktop server and it failed to
  install.

  VM: 2GB memory, 20GB virtio qcow, CPUs: 2

  Installer options:
  Language: English
  Location: United Kingdom
  Detect keyboard layout? No
  Keyboard: English (UK)
  Keyboard Layout: English (UK)
  Hostname: ubuntu
  Full name for the new user: cking
  Username for your account: cking
  Choose a password for the new user: ************
  Re-enter password to verify: ************
  Partitioning method: Guided - use entire disk
  Select disk to partition: Virtual disk 1 (vda) - 21.5 GB Virtio Block Device
  Write the changes to discs? Yes

  Then installer stopped and I cannot progress. See the attached photo
  of the failure.

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