guru_meditation narrowed down

[mMerlin]

Search finds multiple tickets related to guru_mediation failures. The ones I have looked at do not show similar working and failing cases. I think I have narrowed it down for my case. Modifying a vm to have both --bios-apic=x2apic and --cpus=2 set causes the failure. Setting with --cpus=1 or --bios-apic=apic works. Below is a small script I used to create a vm that crashes consistently during boot. Shortly after selecting "*Start Fedora-Workstation-Live 39". The vm was created from the command line, but it was started from the gui.

I suspect interaction with the host hardware, although the documentation says that --bios-apic should automatically fall back if the virtual cpu does not support the requested setting.

host environment

Debian 6.1.67-1 (2023-12-12)
6.1.0-16-amd64
Dell Inc. OptiPlex 790
16.0 GiB
Intel® Core™ i7-2600x8
Debian 12 (bookworm)
Gnome 43.9

That is a 'clean' environment. Very little exists other than VirtualBox

Here is a small script I used to create the minimal failing case vm:

#! /bin/sh -x
VBoxManage createvm --name "guru_test" --register --ostype Fedora_64
VBoxManage modifyvm "guru_test" --graphicscontroller vmsvga --memory 4096 \
  --bios-apic=x2apic --cpus=2

VBoxManage storagectl "guru_test" --name "SATA" --add sata
VBoxManage createmedium disk --format VDI --size 1024 --filename "/home/vm/VirtualBox/Fedora/guru_test/guru_t>
VBoxManage storageattach "guru_test" --storagectl "SATA" --port 0 --type hdd \
  --medium "/home/vm/VirtualBox/Fedora/guru_test/guru_test.vdi"
VBoxManage storageattach "guru_test" --storagectl="SATA" --port 1 --type dvddrive \
  --medium "/home/vm/VirtualBox/ISO images/Fedora-Workstation-Live-x86_64-39-1.5.iso"

[mMerlin]

vbox log

[mMerlin]

automatic screenshot