You are not the only one complaining about recent problems using dual GPU’s.
As title says when i plug in a 2nd gpu (1650) i get no video after sddm login screen, the os is running since i can still hear sounds when plugging and unplugging devices. I already tried every port in each graphics card and still no video. This is on kde plasma 6 wayland and nvidia 555 drivers. I used to run this exact config on fedora 39 (on nvidia 535 drivers) with no troubles, used the second gpu for vfio pass-through for a windows vm.
Hello VFIO/GPU Passthrough there is a guide GitHub - bryansteiner/gpu-passthrough-tutorial
But I don’t get the pattern for
Make sure to substitute the correct bus addresses for the devices you’d like to passthrough to your VM (in my case a GPU and SSD). Just in case it’s still unclear, you get the virsh PCI device IDs from the iommu.sh script’s output. Translate the address…
My guess would be that it’s a bug with the nvidia proprietary driver causing this. I have not used any nvidia products in quite some time, so my I’m probably not the best one to offer advice.
Good luck resolving your issue.
Edited to add recent bug report:
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