March 22, 20215 yr I've recently upgraded to a Ryzen 9 3900XT and a Gigabyte X570 Aorus Pro mobo and everything appears fine except that I can no longer passthrough my Asus RX480 Dual GPU. I have another GPU as the primary. It crashes with the TianoCore logo and the spinning dots stop spinning. One of theallocated hyper threads goes to 100% utilisation. I followed Spaceinvader's youtube videos to no avail. It works ok with VNC graphics. It's in its own IOMMU group and successfully binds in the VFIO-PCI log. I'm at a loss as to the problem. Any suggestions?
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