I get to the Windows login screen, then after logging in, the screen freezes, just saying "Welcome", with a should-be-spinning-but-isn't blue circle next to it.
#Enable iommu in bios drivers
Now that the graphics card drivers are installed on the guest and the PCI device attached, I can't get into the Windows desktop. Before I could use the device though, I had to reboot the guest.
#Enable iommu in bios update
When I next started the guest, Windows Update started doing its thing and automatically detected and installed the correct NVIDIA drivers. As I ran the previous command without sudo privileges, I doubt any changes were made, though. There was no output, and I was returned to the command line almost immediately.īefore turning on the guest, I first rebooted the host machine, in case something undocumented needed to happen in the kernel, by virtualbox-dkms. A reboot later and everything was working fine, so I shut down the guest, and re-ran the command.)
#Enable iommu in bios install
So I changed the Chipset to ICH9 in the VirtualBox VM System settings and turned on the guest to install the necessary new drivers. (When I first ran this, there was an error because VirtualBox was emulating a PIIX chipset it said that PCI pass-through only works with ICH9 chipsets. Then, from the host's command line:- VBoxManage modifyvm "Windows Guest" -pciattach 05:00.0 What I did, which I found less ambiguous, was to open nvidia-settings, select the secondary graphics card and note the Bus ID ("PCI:5:0:0" in my case). This was pleasantly surprisingly simple! The official VirtualBox documentation is here. I couldn't see anything specifically mentioning IOMMU, though. In the BIOS settings, I have VT-x and VT-d support enabled. I'm running linux-3.5.0-19 from the Debian repositories, on quite high-end workstation equipment (Asus P6T7 WS Supercomputer mobo w/ Intel ICH10R chipset and Xeon W3680 CPU) and would like to turn on IOMMU support in the kernel, preferably without having to compile it myself. NVIDIA market this " SLI Multi-OS" configuration, which is basically what I've wanted to set up for ages, but I don't want to spend over a grand on the Virtualisation software (Parallels workstation extreme), when I have been using VirtualBox quite happily for years now.
Cool, I thought! I've got two NVIDIA Quadro FX graphics cards (with SLI bridge connection in place, which I hope isn't causing the grief) and would like to dedicate the 2nd graphics card to the guest OS, so that I can use OpenGL features within Photoshop et al. I recently realised that it's possible to pass through a PCI-express device to guest OS's running in Virtualbox. Giving a guest OS direct access to graphics card It is my understanding (and last option I can think of) that changing this boot option might get rid of the following error message in /var/log/kern.log vboxpci: No IOMMU domain (attach) Documentation I've seen says to edit /boot/grub/menu.lst, which seems to be relevant only for grub 1.x, as I don't have that file. How can I turn on the intel_iommu setting in the Linux kernel? I run a Debian host, using the grub2 bootloader.
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