Closing as Fixed again, based on the previous two comments. Apparently you have to enable virtualization technology in the BIOS and click the VT-x/AMD-v checkbox in Virtualbox.
** Changed in: virtualbox-ose (Ubuntu) Status: Triaged => Fix Released -- 64-bit guest doesn't work https://bugs.launchpad.net/bugs/271651 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