[vfio-users] "Device or Resource Busy"

[Alex Williamson]

On Wed, Mar 16, 2016 at 3:54 PM, Bryan Jacobs <bryanrj at gmail.com> wrote:

> Thanks!
>
> That was exactly what was going wrong. efifb had attached to some of the
> nvidia device's memory.
>
> Since efifb can't be compiled as a module, and I'd rather not turn it off,
> here's what I did:
>
> echo 0 > /sys/class/vtconsole/vtcon0/bind
> echo 0 > /sys/class/vtconsole/vtcon1/bind
> echo efi-framebuffer.0 > /sys/bus/platform/drivers/efi-framebuffer/unbind
>
> This completely solves the problem and all is well doing passthrough on my
> Skylake system.
>
> Hopefully now that there's a solution with the right magic words in it on
> the Internet, others will find their answer here.
>

Another option is video=efifb:off on the kernel commandline.
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