On 19 Dec 2024 at 23:50, Samuel Sieb wrote:

Date sent:              Thu, 19 Dec 2024 23:50:29 -0800
Subject:                Re: VirtualBox no longer working? Loads but gets 
error message.
To:                     users@lists.fedoraproject.org
From:                   Samuel Sieb <sam...@sieb.net>
Send reply to:          Community support for Fedora users 
<users@lists.fedoraproject.org>

> On 12/19/24 11:37 PM, Ron Yorston wrote:
> > The 6.12 kernel has changed the way virtualisation modules are
> > loaded.  Some discussion, with workarounds, here:
> > 
> >     https://www.virtualbox.org/ticket/22248
> >     https://lore.kernel.org/kvm/zwqjusole6swa...@google.com/T/
> > 
> > I was able to get VirtualBox to start by unloading the kvm_intel
> > module with the command:
> > 
> >     rmmod kvm_intel
> > 
> > The above links also have a kernel command line fix which I haven't tried.
> > 
> > (I only use VirtualBox occasionally, to run a Windows XP VM which I've
> > never managed to get working with KVM.  Otherwise I prefer Virtual
> > Machine Manager.)
> 
> I've run several XP VMs with no problem.  What wasn't working?
> 

I use Virtual Box to to my G4L images with grub4dos, 
grub4dos-uefi, syslinux , and memtest images.

With every kernel before 6.12.x it worked fine, but current 6.12.4 it 
failes with error when trying to run any image (all linux).
> VirtualBox can't operate in VMX root mode.
> Please disable the KVM kernel extension, recompile your kernel 
> and reboot.
> (VERR_VMX_IN_VMX_ROOT_MODE).

Rebooting machine and selecting the 6.11.11 kernel, it would run 
everything fine.

I did also, find the doing the rmmod kvm_intel did also let the 
VirtualBox run fine with 6.12.4?

Machines that I run it on are running Fedora 40. Have 4 other 
machines with Fedora 41, but having tested it on those.

on one machine I removed both kvm and kvm_intel, but on other 
just removed the kvm_intel? Both worked.

Not sure what creates the /sys/modules/kvm and 
/sys/modules/kvm_intel?

Note sure what creates these directories. Tried reinstall kernel, but 
the /sys/modules/kvm was not recreated?






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+------------------------------------------------------------+
 Michael D. Setzer II - Computer Science Instructor (Retired)     
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 Guam - Where America's Day Begins                        
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+------------------------------------------------------------+



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