You are not logged in.
I have recently installed Virtualbox to run an Ubuntu server as guest. I could finish the server install, but after that whenever I tried starting it up again it just hung at 20%.
vboxdrv is loaded of course and I get no errors when running virtualbox from the console, besides a QT warning about some known bad sRGB color space (which is most likely irrelevant)
I'm running the vanilla kernel that came with Arch and seem to have no SMAP.
My BIOS has no VT-x option, so I don't think it can be disabled (it is present and enabled in the CPU).
Offline
Post the VBox.log covering the startup and "hang" for the guest that you are trying to start.
Offline
Here are all the logs.
Offline