Hi Ruben, I guess your 750ti also has some audio device. You should pass through this too. It should be something like 01:00.1. There are many command line examples you can find about that. Also I´m not quite sure, if you should remove the x-vga=on.
Regards Alex On Sun, Jan 17, 2016 at 11:12 PM, Ruben Felgenhauer < 4felg...@informatik.uni-hamburg.de> wrote: > Hi, > > I am trying to pass my nVidia GTX 750ti to my QEMU guest. > > Problem is: After the QEMU monitor pops up, nothing happens. The GPU's > output is dead, and the vm won't be accessible via SSH anymore, so it's > very likely that the VM isn't booting up at all. Also, there are no error > messages from QEMU on the console whatsoever which makes debugging it > especially hard. > > This is how I start the vm with normal vga emulation: > qemu-system-x86_64 -hda vm.ovl -boot c -enable-kvm -m 1024 -cpu > host,kvm=off -smp cores=4,threads=2 -redir tcp:5022::22 > Everything runs fine in this case. To do the passthrough, I add this: > -device vfio-pci,host=01:00.0,multifunction=on,x-vga=on -vga none > This brings said problems with it. I also tried out multiple different > combinations of -device's arguments or even adding a romfile for the GPU, > but none of these steps changed anything at all. > > Obviously, I am using a BIOS installation and I'm well-aware with this > bug: https://bugzilla.kernel.org/show_bug.cgi?id=107561, but neither > using less RAM (as you can see I am using 1GB now) nor switching to an > older Kernel changed anything about the problem. I have tried Kernel 4.1.0 > and 4.3.0. > > Host is Debian testing with QEMU 2.5.0. > I tried both Debian and Windows 7 as a guest, but both are showing exactly > the same behaviour. > Mainboard is an ASUS Z87-PLUS. The 750ti is produced by ASUS aswell. > > Any idea how I could get passthrough running? > > _______________________________________________ > vfio-users mailing list > vfio-users@redhat.com > https://www.redhat.com/mailman/listinfo/vfio-users >
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