I have tried a machine with Ubuntu 16.04 32- and 64-bit and Ubuntu 17.10 64-bit several times. Intel Virtualisation is enabled in BIOS. Secure boot is disabled. It happens on kernels 4.13.0-26-generic
and 4.13.0-31-generic
. Maybe it has something to do with the fact that I installed and purged gnome-boxes
earlier. An example of a consequence of that is that a system user Libvirt Qemu
still appears on the login screen and I am afraid that removing it might break something. Interestingly, VirtualBox seemed to work well when I installed it inside an Ubuntu 16.04 virtual machine in the aforementioned gnome-boxes
although unsurprisingly the machines run by it were very slow.

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this is happening to me trying to use rawdisk for a simple Windows 10 guest VM. VirtualBox just immediately freezes the whole host (elementary OS / xenial). – Nathan Beach Jan 14 '18 at 17:08
5 Answers
I had the same Problem after upgrading my Kernel to 4.13.0-26-generic
I selected my previous Kernel 4.10.0-42-generic
in grub on boot time and it worked.
My guess is that there is a problem in the most recent Kernel. (4.13.0-26 at the time of this writing) Problem is, that is the one with a Patch for the vulnerability CVE-2017-5754 (Meltdown).
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I think it didn't work for me, although I'm not entirely sure if I did it correctly and now for some reason I am unable access the grub menu so I can't check it again. – geras Jan 23 '18 at 20:44
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Related: https://askubuntu.com/questions/995819/touchpad-gestures-and-holding-keys-does-not-work/995948#995948 – WinEunuuchs2Unix Jan 31 '18 at 13:42
Same here, solved by installing Virtualbox 5.1.30 from the website.

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If you install it from the website, do you then get automatic updates? Or do you need to install it from the website again every time you want to update it? – geras Jan 17 '18 at 16:29
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@geras You have to go update it yourself - you won't get automatic updates. unless they started serving their own VirtualBox repository with updates in it, and that's added, but I doubt they have that. – Thomas Ward Jan 24 '18 at 19:57
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1@ThomasWard I have actually managed to add a repository and install VirtualBox 5.2.6 from there as described here: https://www.virtualbox.org/wiki/Linux_Downloads in section "Debian-based Linux distributions" so I believe I should be getting automatic updates with Software Updater. – geras Jan 25 '18 at 23:04
This happened to me too. I had to install Virtual Box 5.2.6 and after that I had no problem running vms. However, I did have an issue with Virtual Box 5.2.6 and my iwlwifi driver on my laptop. The computer would just randomly hang. Took me a few days to figure out. Had no problem with other wifi adapter using other drivers. There was an issue with kernel 4.14 with Virtual Box 5.2.6 and iwlwifi. I had no issues prior to the new kernel with the older version of VB

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You can solve this by installing a lower version of virtualbox or the latest version of vmware, or still, downgrade your kernel.

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This seems to be Bug #1736116 "[SRU] Host with kernel 4.13 freezes when starting a VM with VirtualBox"
There is now a fix in the virtualbox packages version 5.1.34, available in the in the xenial-proposed repository, and hopefully soon in the main repository.
For a quick copy/paste solution, this worked for me:
echo "deb http://archive.ubuntu.com/ubuntu/ xenial-proposed restricted main multiverse universe" \
| sudo tee -a /etc/apt/sources.list.d/ubuntu-proposed.list
echo "Package: *" | sudo tee -a /etc/apt/preferences.d/proposed-updates
echo "Pin: release a=xenial-proposed" | sudo tee -a /etc/apt/preferences.d/proposed-updates
echo "Pin-Priority: 400" | sudo tee -a /etc/apt/preferences.d/proposed-updates
sudo apt update
sudo apt-get -t xenial-proposed install virtualbox virtualbox-dkms virtualbox-guest-additions-iso
Once the packages are moved from xenial-proposed to the main repository, you can
sudo rm /etc/apt/sources.list.d/ubuntu-proposed.list /etc/apt/preferences.d/proposed-updates

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