[vfio-users] [Qemu-discuss] vfio pass through only works once after reboot

[Lucas Neves]

Hi José,

You can find my QEMU script in the attached file.

Good luck!
Lucas

On Fri, Sep 4, 2015 at 7:33 PM José Ramón Muñoz <koalinux at gmail.com> wrote:

>         Hi Lucas,
>
>         Do you mind to post your qemu script? I'm having problems trying to
> passthrough a vga through OVMF and I'd like to see more examples.
>
>         Thanks!
>
>         José.
>
> On Friday 04 September 2015 11:51:42 Lucas Neves wrote:
> > I'm very interested in the solution to this problem as well. I pass
> through
> > a Radeon r9 285 (Tonga) to Windows.
> >
> > On my previous setup, with QEMU from the git emulating a Q35 chipset on
> > SeaBIOS and a Windows 8.1 guest, the guest would work only once per boot
> of
> > the host. If I soft-reset the guest or shut it down and tried to run QEMU
> > again, the guest monitor would stay blank (although QEMU would continue
> > running, with no error messages). I have noticed that this problem only
> > occurs when using the proprietary AMD driver in the guest: running on the
> > native Windows 8.1 video driver, the guest could reboot without problems.
> >
> > This week, I decided to change the whole system, hoping that something
> > would fix this problem. So now I'm emulating a i440fx chipset, using
> OVMF,
> > with a fresh install of Windows 10 as guest. Things have improved: now
> the
> > guest system can withstand soft reboots without problems. But whenever I
> > shut down the guest machine, it is still not possible to turn it on again
> > without rebooting the host.
> >
> > Sorry I don't have my start script here, I can post it later if
> necessary.
> > But I inkove QEMU as a super user (sudo qemu-system-x86_64). And my host
> OS
> > is Ubuntu 15.04.
> >
> > Thanks,
> > Lucas
> >
> > On Thu, Sep 3, 2015 at 3:39 PM Blank Field <ihatethisfield at gmail.com>
> wrote:
> > > There is a special mailing list for all the vfio questions. It aims to
> > > replace the arch forum thread.
> > >
> > >
> http://lists.nongnu.org/archive/html/qemu-discuss/2015-09/msg00003.html
> > > I couldn't manage to not screw up the formatting with G-Mail, so there
> you
> > > have it as a link to archives.
> > >
> > > Regarding the problem - i don't remember exactly, but running qemu as a
> > > regular user requires some more steps than just chown.
> > > _______________________________________________
> > > vfio-users mailing list
> > > vfio-users at redhat.com
> > > https://www.redhat.com/mailman/listinfo/vfio-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150904/4981a193/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Win.script
Type: application/octet-stream
Size: 2475 bytes
Desc: not available
URL: <http://listman.redhat.com/archives/vfio-users/attachments/20150904/4981a193/attachment.obj>