Bug 34408 - VirtualBox borked with newer kernels - VMX Root Mode
Summary: VirtualBox borked with newer kernels - VMX Root Mode
Status: NEW
Alias: None
Product: Mageia
Classification: Unclassified
Component: RPM Packages (show other bugs)
Version: Cauldron
Hardware: All Linux
Priority: Normal major
Target Milestone: ---
Assignee: Kernel and Drivers maintainers
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Reported: 2025-06-30 16:28 CEST by Frank Griffin
Modified: 2025-07-14 17:13 CEST (History)
1 user (show)

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Source RPM: kernel
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Description Frank Griffin 2025-06-30 16:28:15 CEST 
With the 6.12.x kernels, trying to launch a VirtualBox VM gives:

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)

Worked OK on 6.6.87.
Comment 1 Morgan Leijström 2025-06-30 16:40:13 CEST 
This is being discussed in dev mail list

Same for mga9 kernel in backport testing

I do not set flag MGA9TOO because we only have 6.12 in testing.

CC: (none) => fri
Assignee: bugsquad => kernel

Comment 2 Frank Griffin 2025-07-12 22:28:11 CEST 
Any update here ?  I haven't seen anything about this in dev.  I assume that the problem is that something else requires VMX root mode, otherwise why not just rebuild the kernels without it ?
Comment 3 Morgan Leijström 2025-07-14 17:13:16 CEST 
In mail correspondence with Giuseppe, he suggested the workaround:

$ sudo rmmod kvm_intel
$ sudo rmmod kvm

And after that VirtualBox (7.1.10) runs fine on mga9 backport_testing kernel 6.12.37-desktop-1.stable

So he is on it..
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