[vfio-users] Passthrough VGA on first slot

[Pedro Henrique Lara Campos]

Yep, you both we're right, uvesafb was using GPU, now nothing besides vfio
is using it, yet I have no video, but there are no more mmap unsupported
errors, with a romcard there is no ROM error, there are also no errors in
AMD-Vi, qemu, IOMMU. Windows still loads fine, I can turn it off through
monitor, every qemu setting is identical it was when GTX was in slot2 (in
this slot I could see from OVMF bios until machine goes off) with exception
of host pci addr but in slot1 it doesn't seems to want to start at all...

2015-10-02 10:27 GMT-03:00 Blank Field <ihatethisfield at gmail.com>:

> Do cat /proc/iomem to find out who is using your GPU. I predict uvesafb or
> something like that. Disable or uninstall this.
> Also, don't you have pci-e 3.0 onboard?
> On Oct 2, 2015 4:22 PM, "Pedro Henrique Lara Campos" <
> pedro.laracampos at gmail.com> wrote:
>
>> Hello masters of vfio. I've been playing with vfio for 3 weeks now, and
>> here is a resume of what i got: When I put my loved GTX780 on the second
>> pci-e slot of my GA-970A-DS3P everything works on Windows (guest) while my
>> Linux (host) stays comfortable with a Radeon HD 6670.
>> But, as I wouldn't be writing this email if nothing was wrong, my second
>> pci-e slot is "PCIEX4" only, I believe that's because my FPS goes down and
>> HDMI audio keeps crackin. I had to change the slots, my bios doesn't have
>> an option to choose which GPU to use, so it uses the GTX, GRUB does it too,
>> then gpu gets binded by modprobe and I have no video until XOrg starts on
>> Radeon, if I start qemu, I've get:
>>   "vfio_ecap_init: 0000:01:00.0 hiding ecap 0x19 at 0x900"
>>   "BAR 3 mmap unsupported. Performance may be slow"
>>   "vfio-pci 0000:01:00.0: Invalid ROM contents"
>> No video on GTX, Windows boots normally, I can even hear notifications
>> sounds, I can turn it off through "system_powerdown".
>> Tried using a romfile, it only makes the third message goes away, no
>> other thing changes...
>>
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>>
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