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<div class="moz-cite-prefix">OK, now this is a new information for
me. I thought all along that my problem is the graphics card.<br>
<br>
I tried to understand your whole message but I got lost at MMIO
and PIO.<br>
For the sake of saving my precious time and avoiding frustration,
I should better get a new motherboard and CPU? How high are the
chances it will work with my GXT750 Ti?<br>
Any hardware suggestions (I have DDR3-1600 memory that I would
like to keep using)?<br>
<br>
Thank you<br>
<br>
<br>
<br>
On 9/17/2015 1:18 PM, Blank Field wrote:<br>
</div>
<blockquote
cite="mid:CABZ9gByfhAqM8XM0ovO0Ps+Q8+t+tRF=XWhw_cY5sdRpEvs_9Q@mail.gmail.com"
type="cite">
<p dir="ltr">You have an AMD FM2 CPU.<br>
Do use SeaBIOS and make use of VGA I/O lines, you must have a
VideoBIOS Extension support in your GPU's firmware. Since we are
in the 21'st century, you have it.<br>
But the problem is that in order to make VGA work in a VM we
must translate MMIO, PIO and IRQs needed into the VM.<br>
That is where IOMMU kicks in, and the related part of software
is vfio-pci's x-vga option. <br>
Usually you enable x-vga, vfio tells IOMMU to translate all VGA
related stuff from GPU to the VM and vice versa, but on that
particular platform(AMD FM2) something is broken in hardware
that crashes the IOMMU and the CPU when trying to work with VGA.</p>
<div class="gmail_quote">On Sep 17, 2015 3:15 AM, "Alex
Williamson" <<a moz-do-not-send="true"
href="mailto:alex.williamson@redhat.com">alex.williamson@redhat.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div class="gmail_extra">
<div class="gmail_quote">On Wed, Sep 16, 2015 at 6:06 PM,
Mogliii <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:mogliii@gmx.net" target="_blank">mogliii@gmx.net</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Dear
Alex,<br>
<br>
What do you mean you are suspicious of pci-stub?<br>
All tutorials I've seen so far require you to prevent
nuveau from<br>
grabbing the card. Also in your very well written
tutorial I followed<br>
and helped me a lot.<br>
(<a moz-do-not-send="true"
href="http://vfio.blogspot.jp/2015/05/vfio-gpu-how-to-series-part-3-host.html"
rel="noreferrer" target="_blank">http://vfio.blogspot.jp/2015/05/vfio-gpu-how-to-series-part-3-host.html</a>)<br>
<br>
I just tried the MSI GTX 750 Ti with Bios mode (bios
selection switch -><br>
1, followed by host reboot). But it behaves the same.
I see the ovmf<br>
bios and boot splash, but then loss of signal.<br>
</blockquote>
<div><br>
</div>
<div>It's not that you're using pci-stub, it's that
pci-stub is built as a module on your kernel and you
need to be sure to put all the pieces in place to make
sure that module gets loaded before anything else that
might touch the device. As I said, it appears to be
working, but you're still getting a code 43. </div>
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</blockquote>
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