[6.8] GPU Passthrough with no monitor connected.


ross232

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Hello,

 

I have GPU pass through working on an RX480 / Ryzen machine. I'm having an issue when no monitors are connected at the time I boot in the unRAID server. If I do this I am still able to start the Windows VM but I get an error code 43 and it reverts to the Microsoft Basic Display Adapter.

 

If I connect a display and boot the unRAID server, the VM starts but this time the RX480 driver loads normally (at whatever resolution the HDMI input reports). I have ordered a dummy HDMI adapter in the interim.

 

I am using the following workaround from this thread as I couldn't get GPU pass-through working without it:

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

 

I will try disabling this tonight incase it isn't needed when no display is present.

 

Does anyone have any thoughts?

 

Thanks!

 

Ross.

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