Without performing any update, suddenly today when I tried to power on a VM in VirtualBox, the host machine (running Ubuntu 16.04) freezed.
I tried couple of times and the problem keep repeating.
I run memtest: all good
Tried to create a new VM just in case: same issue.
- Downgraded the VirtualBox installation: didn't help at all.
- Disabled network, shared folders etc: Nothing.
On the same machine I've also got Windows 10 in dual boot. I've got couple of VMs there in VBox and VMWare. Just to minimize the probability of any HW issue, I started the VMs there and they work just fine.
The only way to recover the host was to hard-reset.
ps: The freeze happens as soon as I click the "Start" button.
VirtualBox: Version 5.0.40_Ubuntu
Guest: irrelevant (windows 10, OpenSuse, CentOS)
The log file of VirtualBox is empty.