Public bug reported:
I used virt-manager to define an arm64 virtual machine with 16 CPUs.
Booting the VM failed because the generated libvirt XML did not contain
<features>
<gic version='3'/>
</features>
Gic version 3 is needed to accommodate more than 8 CPUs. Libvirt should
select this feature by default when generating the machine description.
As default users cannot be expected to know that lack of this feature is
limiting the number of CPUs we should change the defaults for autogenerated
libvirt XMLs.
---
ProblemType: Bug
ApportVersion: 2.33.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
DistroRelease: Ubuntu 25.10
Package: libvirt (not installed)
ProcCmdline: BOOT_IMAGE=/vmlinuz-6.14.0-15-generic
root=/dev/mapper/vgkubuntu-root ro
ProcVersionSignature: Ubuntu 6.14.0-15.15-generic 6.14.0
Tags: questing
Uname: Linux 6.14.0-15-generic x86_64
UpgradeStatus: Upgraded to questing on 2025-05-17 (33 days ago)
UserGroups: N/A
_MarkForUpload: True
modified.conffile..etc.libvirt.libvirtd.conf: [modified]
mtime.conffile..etc.libvirt.libvirtd.conf: 2024-12-14T03:56:02.085568
** Affects: libvirt (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-collected questing
** Tags added: apport-collected questing
** Description changed:
I used virt-manager to define an arm64 virtual machine with 16 CPUs.
Booting the VM failed because the generated libvirt XML did not contain
<features>
<gic version='3'/>
</features>
Gic version 3 is needed to accommodate more than 8 CPUs. Libvirt should
select this feature by default when generating the machine description.
- As default users cannot be expected to know that lack of this feature is
- limiting the number of CPUs we should change the defaults for
- autogenerated libvirt XMLs.
+ As default users cannot be expected to know that lack of this feature is
limiting the number of CPUs we should change the defaults for autogenerated
libvirt XMLs.
+ ---
+ ProblemType: Bug
+ ApportVersion: 2.33.0-0ubuntu1
+ Architecture: amd64
+ CasperMD5CheckResult: unknown
+ CurrentDesktop: KDE
+ DistroRelease: Ubuntu 25.10
+ Package: libvirt (not installed)
+ ProcCmdline: BOOT_IMAGE=/vmlinuz-6.14.0-15-generic
root=/dev/mapper/vgkubuntu-root ro
+ ProcVersionSignature: Ubuntu 6.14.0-15.15-generic 6.14.0
+ Tags: questing
+ Uname: Linux 6.14.0-15-generic x86_64
+ UpgradeStatus: Upgraded to questing on 2025-05-17 (33 days ago)
+ UserGroups: N/A
+ _MarkForUpload: True
+ modified.conffile..etc.libvirt.libvirtd.conf: [modified]
+ mtime.conffile..etc.libvirt.libvirtd.conf: 2024-12-14T03:56:02.085568
--
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https://bugs.launchpad.net/bugs/2114959
Title:
Creating a 16 core arm64 virtual machine fails
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