I don't know the design, so I can't add much information. But I expect it is a timing issue between the kernel and one of the virtualbox kernel modules. They do things in 2 threads (one from the kernel and one from virtualbox) and they are not properly synched. So in some systems it will work always, in others it will fail always and in others it will work occasionally. Nobody will have detected it during e.g a review, because the maintenance is done by 2 separate teams.
The fact that it works fine with linux kernel 6.5 (22.04) and fails with linux kernel 6.8 (24.04), means I would suspect a change in the kernel itself causing the issue. Note that all my VMs run on Virtualbox Guest Additions 7.0.20. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2076520 Title: Ubuntu 24.04 LTS VBox VM does not boot anymore To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2076520/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
