[Qemu-block] graphics card hotplug

[Lying]

I encounter a question, is about Linux Virtualization.

I have a graphics card is 960,

And i want to bind it to my guest when my vm is running

So I use "attach-device" to get it, But i am failed

Then i check my gpu

It's show me i attach successfully.

Only display is black.

What should i do?