Issue with hiding GPU for passthrough

[apparatus]

@privacyuser

I’m fairly certain that the gpu pci slots aren’t the issue here (considering that the screen is mirrored up until I select which option I want in the boot loader.

It could be an issue, also maybe there is some issue with cable type priority, you can try to disconnect the second monitor during boot:

GPU Passthrough -> lightdm.service won't start

It probably try to use the GPU you just hide from dom0. Assuming you used the correct value for rd.qubes.hide_pci: Only plug your primary GPU to your primary screen. Once you successfully booted into Qubes, plug the secondary GPU to the secondary screen Also did you checked my comment about this subject Note: if after this step when you reboot the computer you get stuck in the QubesOS startup that means you are trying to use the GPU you just hide. Check your BIOS options. Also check the c…