Dear Alexander, On Fri, 17 Nov 2017 13:09:38 +0500 "Alexander V. Makartsev" <avbe...@gmail.com> wrote:
> How many video adapters in your host machine? In BIOS you have to > select video adapter to be initialized first (ex. IGFX). It has to be > other than GTX1080, and you can't use 1080 in your host OS if you > want it to be passed through to guest OS. This is the reason why you > need vfio stub drivers, to protect 1080 from host OS interference. On the host machine I have the integrated graphics and the additional NVidia card. Not sure how to initialize it first. But I have chosen IGFX to be the default. The BIOS is shown on the monitor attached to the IGFX. In the first setting I disabled the NVidia card I believe. Now it is activated but not the primary card. Thank you a lot for the explanations. I have a monitor attached to the GTX1080, but only because I will want to use it in the guest. I will check the configuration of the host: No NVidia driver, blacklisted nouveau, vfio stub, and all of the virsh settings. Also I will try a clean install of the host system and recreate the guest(s). What I just did is applying the virsh edit vendor_id and hidden state settings: /etc/libvirt/qemu/win10.xml: https://pastebin.com/7Rewq21Y Then I started the Windows 10 guest and after checking that it did not help, removed the GeFore card and the PCI devices in the Windows "device drivers" screen. I then shut down the guest, removed and readded the PCI devices in virt-manager and restarted the guest, made Windows reinstall the driver, rebooted the guest again and still find the error 43. What makes me wonder: You write that the deliberate disabling of the card is only implemented in the Windows version of the driver. But I do find the same error using a Debian 9 guests. Do you have any other ideas what I could try? Thanks and best regards, Ramon