On Thu, Dec 19, 2024 at 7:00 PM Michael D. Setzer II via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On 20 Dec 2024 at 9:33, Michael D. Setzer II via user wrote: > [...] > > Used it a couple weeks ago, but now get this error message went > > trying to start. > > > > 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). > > > > Found a link that talks about fixing on Ubuntu, but options don't > > seem to exist on Fedora 40. > > > > Don't use KVM. Looked at removing kvm, but it showed it would > > also remove 112 dependency files so opted not to do that? > > > > Any solutions? > > Did a test. If I reboot and select 6.11.11 kernel then VirtualBox > works fine, but using the 6.12.4 kernel it fails with error? > > So, know virtual box images are not issues, but something with the > 6.12.4 kernel? This used to happen to me on occasion when a new kernel was released. I found the problem was video drivers. VirtualBox would fail to load until 6.12 video drivers showed up. Once the new video drivers arrived, DKMS would rebuild the VirtualBox driver for 6.12. (NVIDIA or AMD was the holdup for the video drivers for the newer kernel). I don't recall if I received the same error as you -- the VERR_VMX_IN_VMX_ROOT_MODE one. However, I recall the machine would fail to boot. My solution was to switch to QEMU/KVM. The kernel folks maintain the KVM drivers, so they are always up to date. Jeff -- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
