Hi,
These are the last few lines:
01:00.0 VGA compatible controller: NVIDIA Corporation GM107 [GeForce GTX
750 Ti] (rev a2)
Kernel driver in use: pci-stub
Kernel modules: nvidia
01:00.1 Audio device: NVIDIA Corporation Device 0fbc (rev a1)
Kernel driver in use: pci-stub
Kernel driver in use: ahci
Best regards,
Ruben
Am 28.01.2016 um 21:28 schrieb Ryan Flagler:
Ruben,
What is your output from this?
lspci -k | egrep -i '(nvidia|driver)'
Just need the lines with your video card and the driver line below
each one of those.
On Thu, Jan 28, 2016 at 2:18 PM Ruben Felgenhauer
<[email protected]
<mailto:[email protected]>> wrote:
Hi again, Will!
I had removed the hypervclock tag back then, but forgot to mention
it, sorry.
In the meantime I played around with the config quite a lot, but
nothing helps, always Code 43.
I tried to compare your xml file with mine, but nothing really
stuck out.
Can you remember having done anything special to get the 750ti to
work?
Did you ever have problems with Code 43 aswell?
Is it maybe a problem with other devices or is the gpu simply
still noticing the hypervisor?
Config is here: http://pastebin.com/fL6PGrM0
Best regards,
Ruben
Am 25.01.2016 um 17:01 schrieb Will Marler:
This is discussed in
http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part-4-our-first.html.
You have to do more than <kvm><hidden state='on'/></kvm>:
"The GeForce card is nearly as easy, but we first need to work
around some of the roadblocks Nvidia has put in place to prevent
you from using the hardware you've purchased in the way that you
desire (and by my reading conforms to the EULA for their
software, but IANAL). For this step we again need to run virsh
edit on the VM. Within the <features> section, remove everything
between the <hyperv> tags, including the tags themselves. In
their place add the following tags:
<kvm>
<hidden state='on'/>
</kvm>
Additionally, within the <clock> tag, find the timer named
hypervclock, remove the line containing this tag completely.
Save and exit the edit session."
I can confirm it works, I've been getting a lot of mileage from
my passed-through 750Ti lately since getting a Steam Link :-D.
On Sun, Jan 24, 2016 at 7:32 AM, Ruben Felgenhauer
<[email protected]
<mailto:[email protected]>> wrote:
Hi,
finally I had time to this again. I tried out virt-manager
and after a bit of playing around with it, it /somewhat/ worked:
The machine is at least booting. I still have a standard vga
card enabled in the virt-manager config window.
After the machine has booted, I can see that the device gets
recognized as 750ti.
However, the gpu doesn't get used, because of 'Code 43'.
Code 43 is a generic error, so any idea what it could mean in
this case?
Of course I added the <kvm><hidden state='on'/></kvm> lines
at the associated position.
Best regards,
Ruben
Am 18.01.2016 um 22:27 schrieb Will Marler:
I'm not sure what correct command-line syntax is. Have you
tried using libvirt and VirtManager to handle your VM rather
than command line, and modifying the XML rather than the
command line? I think that's generally the preferred method
these days (it's certainly easier from my point of view, and
the way I got my 750 Ti to pass through).
On Mon, Jan 18, 2016 at 11:04 AM, Ruben Felgenhauer
<[email protected]
<mailto:[email protected]>> wrote:
Hi, Alex!
Thanks for your reply!
My GPU indeed has a seperate audio device located at
01:00.1.
However, just adding -device vfio-pci,host=01:00.1
doesn't seem to do the trick.
Of course the corresponding device is already
blacklisted and bound to vfio.
The Debian Wiki entry about VGA passthrough
(https://wiki.debian.org/VGAPassthrough) mentions QEMU
arguments like "-device
vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on,romfile=...
-device vfio-pci,host=01:00.1,bus=pcie.0" which seems to
address GPUs with audio devices, but if I try to do
something similar, the buses 'root' and 'pcie' couldn't
be found. Maybe I missed something very important?
On the same article, it says that the "HDMI soundcard
[...] needs to be unbound from its driver":
# echo '0000:01:00.1' | sudo tee
/sys/bus/pci/devices/0000:01:00.1/driver/unbind
I figured the vfio-bind script from the Arch Linux Forum
thread
(https://bbs.archlinux.org/viewtopic.php?id=162768)
would do exactly this thing, so I didn't explicitly do
so for the audio device. Is that okay?
Best regards,
Ruben
Am 18.01.2016 um 08:31 schrieb Alexander Petrenz:
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
<[email protected]
<mailto:[email protected]>> 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?
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