VirtualBox was working fine until the last upgrades from Ubuntu 18.04. About a week ago.
Failed to open a session for the virtual machine manjaro.
AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED).
Result Code: NS_ERROR_FAILURE (0x80004005)
Component: ConsoleWrap
Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed}
Best Answer
Per this comment, the solution was to enable it in BIOS. How did it end up disabled after upgrade in the first place? Well, it could've been because of firmware upgrade, or even because of a BIOS glitch. I'm in particular have been dealing at work with a PC whose UEFI in obscure circumstances been disabling VT-x (an Intel analog to AMD-V), so I had to manually enable it back.