Public bug reported:

Because of the following patch:

  From 73efd3699e8e1b1f4521af63401184e31dd3cd97 Mon Sep 17 00:00:00 2001
  From: Stefan Bader <[email protected]>
  Date: Sat, 3 May 2014 17:10:29 -0400
  Subject: [PATCH 2/2] libxl: Fix up VRAM to minimum requirements

  This is a bit debatable. On one side it hides configuration errors
  in a way that makes them hard to spot. On the other side there is
  at least one issue with (maybe some older versions) virt-manager.
  Virt-manager sets VRAM directly, not using the default memory setting
  but uses too small values for libxl. Worse, those versions do not seem
  to allow to change VRAM from the GUI. So switching the video type to
  VGA makes the guest fail to start until one manually adapts the VRAM
  size in the XML definition.
  With this change this would not happen but VRAM will be bigger than
  the GUI says. This would not be that different from current Cirrus
  behaviour. Only that in that case qemu seems to ignore the provided
  size.

  Signed-off-by: Stefan Bader <[email protected]>

We can't recompile cleanly libvirt in Ubuntu Disco, with the following
error:

libtool: link: ( cd ".libs" && rm -f "libvirt_driver_lxc_impl.la" && ln -s 
"../libvirt_driver_lxc_impl.la" "libvirt_driver_lxc_impl.la" )
../../../src/libxl/li bxl_conf.c: In function 'libxlMakeVideo':
../../../src/libxl/libxl_conf.c:2393:13: error: enumeration value 
'LIBXL_DEVICE_MODEL_VERSION_UNKNOWN' not handled in switch [-Werror=switch-enum]

So I have to change this patch (non-upstream) to fix that issue.

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: Fix Released

** Affects: libvirt (Ubuntu Disco)
     Importance: Low
     Assignee: Christian Ehrhardt  (paelzer)
         Status: Confirmed

** Also affects: libvirt (Ubuntu Disco)
   Importance: Undecided
       Status: New

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

** Changed in: libvirt (Ubuntu)
       Status: New => Fix Released

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

** Changed in: libvirt (Ubuntu Disco)
     Assignee: (unassigned) => Christian Ehrhardt  (paelzer)

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https://bugs.launchpad.net/bugs/1849342

Title:
  Disco libvirt FTBS for the next SRU

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