Blank Screen on reboot

[ripplethor]

Hi - I have followed the guide on manjaro 5.10 to the letter (making sure i was in SU mode)
After the script has been completed, I reboot and using grub menu, select Manjaro.
However at this point I get a blank screen.

I then reverted to the backup so I could get into manjaro and changed the kernel to 5.4 so as to give this a trry.
However when I reboot I get to grub as normal, select 5.4 manjaro and the screen shows a corrupted green line with artifacts.

My main GPU is NVIDIA 1650 and my second is a Radeon 7950. AMD ryxen 3950 on MSI Unify MB.

Is there any debugging I can do?

[pavolelsig]

The most common issue is that the GPU you're trying to use for the host gets bound to vfio-pci. Check whether you get output on the other GPU.