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