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

[Lucas Neves]

Actually, according to
http://www.techpowerup.com/vgabios/index.php?did=1002-6939-- , it seems
that my Radeon r9 285 manufactured by ASUS also comes with a BIOS that does
not support UEFI! My video card works with OVMF, though.

There are BIOS available from other manufacturers, such as Sapphire, that
do support UEFI. Should I try those, or is that a bad idea? Would there be
any potential benefits?

Best,
Lucas

On Fri, Sep 4, 2015 at 11:51 PM José Ramón Muñoz <koalinux at gmail.com> wrote:

>         Hi Lucas,
>
>         Thanks for the script, though we address that my problem is that
> my gpu
> doesn't have UEFI support, so there is no way to make it works with OVMF.
>
>         Best regards.
>
>         José.
>
> On Friday 04 September 2015 20:11:27 Lucas Neves wrote:
> > 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
>
>
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