I have assigned two CPU cores to the VM and the performance graph in
virt-manager shows a constant 50-51% usage.
I have created two simple virtual drives (both IDE, raw), one to use as
a hard disk and one for a CDROM drive to boot the installation image.
This was done in the setup wizard in virt-manager, so this is more or
less the default configuration I guess. As I said before, the VM boots
this without problems if I remove the assigned graphics card from it.
I don't pass through anything but the two PCI devices for my graphics
card (one for the GPU, one for the HDMI audio).
I tried converting the XML configuration to qemu arguments with
domxml-to-native, but I get this error every time:
Error: Internal Error: invalid PCI passthrough type 'default'
I have searched for an explanation and potential solution to this error,
but the only thing I found was about a bug in libvirt from two years
ago, so I am not sure what this error is supposed to mean. I will have
to further investigate this.
For reference, here is the XML configuration: http://pastebin.com/RNDhgdK1
Am 10.04.2016 um 16:46 schrieb Blank Field:
100% one core CPU?
What kind of disk device you have?
Are you passing through a physical disk?
What you can do - convert libvirt xml into a usual qemu command line,
and add an ISA debug console and check OVMF debug output in it.
On Apr 10, 2016 5:04 PM, "Stefan Seil" <stefan.s...@gmx.net
<mailto:stefan.s...@gmx.net>> wrote:
Hello there!
I am trying to set up a PCI passthrough for my graphics card. I
followed the instructions on vfio.blogspot.com
<http://vfio.blogspot.com> and used vfio-pci and OVMF, and so far
everything seemed to work fine. When I now try to start the VM
with my graphics card passed through, though, it shows the
TianoCore boot splash (with the successfull memory test notice on
the bottom) on the monitor connected to the card and stops there.
I tried waiting for quite a while, but it is stuck at this boot
splash. If I remove the PCI devices from the VM, the OS boots
without problems.
I don't see any error messages in any of the relevant logs I can
think of (libvirt log, dmesg, virt-manager itself). The only line
showing up in the libvirt log (/var/log/libvirt/qemu/...) is the
following:
2016-04-10 10:45:08.461+0000: starting up libvirt version: 1.3.2,
package: 0~15.10~ppa0 (Jacob Zimmermann <p...@jzimm.net
<mailto:p...@jzimm.net>> Fri, 04 Mar LC_ALL=C
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
QEMU_AUDIO_DRV=spice
/usr/bin/kvm-spice -name xubuntu2 -S -char device redirected to
/dev/pts/9 (label charserial0)
I don't really have an idea what the problem could be, especially
since there are no errors showing up. I am using an Intel Core
i5-3470, a Sapphire HD 7850 (AMD) and Xubuntu 15.10 on the host. I
installed all the relevant tools from a PPA by Jacob Zimmermann in
order to get more recent versions of qemu, virt-manager and the likes.
One thing I should note is that the ROM of my graphics card does
not support UEFI out of the box. As it is, the passthrough did not
work at all; there was nothing showing up on the monitor connected
to the card. I found a ROM from a similar model by Gigabyte that
supports UEFI, though, and passed it to the VM. Now the monitor
shows the TianoCore boot splash, but stops there. Could this be
the problem? I would think that it should work this way, though,
as the boot splash is already passed to the card; otherwise there
would be nothing showing up on the monitor, right?
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