Dear Alexander, Thanks for your reply and sorry for my late response. If I may ask you to reply to all and keep me in CC, this way I get the email in my client and can easily answer.
> On 14.11.2017 02:37, Ramon Hofer wrote: > > Thank you very much for your reply. > > Interesting. I thought I was just not able to setup KVM / QEMU > > properly. Because I read and heard that NVidia deliberately switches > > the card off when the driver detects that it is virtualised. > > > > I am using the newest BIOS version (updated on Sunday) on the > > motherboard: > > Supermicro C7Z170-M > > BIOS Version: 2.0a > > BIOS Tag: 1088B > > Date: 07/17/2017 > > Time: 15:51:37 > > > > Unfortunately I do not know anything about a bioy\uefi firmware > > bug. Is this a known issue of my mainboard version? > > > > In the BIOS for the "Boot mode select" setting, I have chosen > > "Legacy" (there would also be "UEFI" or "DUAL"). Do you think it > > might be worth trying to change it to the other two? > > I can't tell for sure if it will help. Basically, you have to enable > VT-d, IOMMU in BIOS and stick with it. I have enabled VT-d but could not find IOMMU in the BIOS. But since: > You can check if all features of QEMU are enabled on your host by > typing: $ virt-host-validate The command reports everything enabled. virt-host-validate: https://pastebin.com/FUbNst11 > > I have uploaded dmesg output if it helps: > > dmesg: https://pastebin.com/79Us7WMf > > > > In the Windows 7 guest, the reported IDs are: > > VEN_ID: 10DE > > DEV_ID: 1B06 > > > > The driver version in the Windows 7 guest is: > > 23.21.13.8813 (Date: 27.10.2017) > > > I'd try different versions of nVidia drivers, not only most recent one > and perform clean install of the drivers. Just to be sure: I do not need the drivers on the Debian host since the GPU is passed through to the guest. I had clean installs of everything. I will have to look at the weekend for an older driver and test it... > > I have [...] postponed the purchase due to lack of patience. > > You can download and try Windows 10 for free and play with it for a > 90-days trial period. Get the regular one, not LTSB. > https://www.microsoft.com/en-us/evalcenter/evaluate-windows-10-enterprise > Might be your best bet to try KVM with Windows 10 guest without > spending any money. Thanks for the tip. I created a Windows 10 Enterprise AMD64 guest. Unfortunately with the same result. Some other thing I was thinking: I read on the Supermicro homepage that the C7Z170-M supports 7th generation i7s (like my i7-7700K). But in the printed manual it was written that it only supports 6th Generation i7. But then I gues it would not even boot up, if the CPU was not supported. And the following findings also say otherwise. To test if the card is not dead, I have just removed the nouveau blacklist, and the options vfio-pci ids=10de:1b06,10de:10ef in /etc/modprobe.d/vfio.conf. After a reboot, I then installed nvidia-detect, nvidia-driver, and nvidia-xconfig, as well as task-xfce-desktop on the Debian 9 host. But when I booted, the display of the NVidia card remained black (just like previously in the Debian guests). It is still possible to Alt+Ctrl+F1 into a different terminal. Then I reset the BIOS setting to the defaults and booted again into the original Debian 9 host's XFCE4. This time it worked. I am now running unigine benchmark and it runs quite well. Now I think I do not understand the basic concept of PCI passthrough correctly. I have added again the /etc/modprobe.d/vfio.conf option and rebooted. The nouveau driver was already blacklisted by a softlink to /etc/alternatives/glx--nvidia-blacklists-nouveau.conf. Probably I have to remove the nvidia-driver again to be able to reserve the card for KVM? First I set the primary video card in the BIOS to the internal graphics of the mainboard/CPU. Then I have retried it with Windows 10. Still no luck. Not sure what to try next. Thanks again for your much appreciated help and time. Best regards, Ramon
