I've had similar experiences. My machine does not have hardware virtualization support, and Lucid images were working fine in Virtualbox up to a point. Now they can only start the bootloader, and whenever I try "Try Ubuntu without installing" or "Install Ubuntu", the VM hangs with 100% CPU usage. That's with either the desktop or alternate CDs, and I could reproduce it both in Karmic and Lucid host systems with different virtualbox versions.
There's also bug 518745, which might be a duplicate. -- virtualbox: Lucid alpha2 does not boot https://bugs.launchpad.net/bugs/508777 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
