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

[José Ramón Muñoz Pekkarinen]

	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