Launch VM failed: Property 'host-arm-cpu.sme' not found

[ivoterhorst]

Describe the bug
Trying to launch any of the default of available VMs, e.g. multipass launch docker --name node1. This fails:

launch failed: The following errors occurred:
Unexpected error in object_property_find_err() at ../../../qom/object.c:1330:
qemu-system-aarch64: Property 'host-arm-cpu.sme' not found

It then shows up with state Unknown when performing multipass list.

To Reproduce

1. Clean install of Multipass 1.15.0 on Mac OS Sequoia 15.2
2. multipass launch docker --name node1
3. multipass launch lts --name test1

Both show the same error

Expected behavior
A working VM

Logs
multipass.log

Additional info

• OS: macOS 15.2 (On Apple M4Pro)
• multipass version: 1.15.0+Mac
• multipass info: Name: node1
  State: Unknown
  Snapshots: 0
  IPv4: --
  Release: --
  Image hash: 6e1f90d3e81b (Ubuntu 24.04 LTS)
  CPU(s): --
  Load: --
  Disk usage: --
  Memory usage: --
  Mounts: --

Name: test1
State: Unknown
Snapshots: 0
IPv4: --
Release: --
Image hash: 6e1f90d3e81b (Ubuntu 24.04 LTS)
CPU(s): --
Load: --
Disk usage: --
Memory usage: --
Mounts: --

• multipass get local.driver: qemu

Additional context

[levkropp]

Hi @ivoterhorst, thanks for bringing this up! This seems to be the same issue as #3842. Please check out the workaround mentioned there. I'll close this issue to keep the discussion centralized.

[ivoterhorst]

Thank you for letting me know that this is already a know issue. There seems to be a typo in the reference to the known issue; I believe that you meant this one: #3842.