[vfio-users] Hotplug problem

[Hristo Iliev]

On 05.11.2017 00:53, Patrick O'Callaghan wrote:
> On Sat, 2017-11-04 at 12:09 +0000, Ferdinand Pöll wrote:
>> > Is there some special magic to make this work, or is this a known bug
>> > in QEMU/KVM and I should just forget about it?
>> 
>> This sounds like a common problem which occurs when you are using a 
>> GPU in a VM without Message-Signal-based-Interrupts. Please try this:
>> * 
>> https://wiki.lime-technology.com/UnRAID_Manual_6#Enable_MSI_for_Interrupts_to_Fix_HDMI_Audio_Support
>> * 
>> https://forums.guru3d.com/threads/windows-line-based-vs-message-signaled-based-interrupts.378044/
> 
> Thanks, I took a look and although the PCIe board and GPU are both
> listed as MSI-capable by lspci on the host, they don't offer that in
> the Windows registry.
> 

The registry keys are often not present and have to be created manually. 
See Alex's blog entry here:
http://vfio.blogspot.de/2014/09/vfio-interrupts-and-how-to-coax-windows.html

Hristo

> poc
> 
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