I have the same problem using the Lenovo 530S-14ARR with Ryzen 5 2500U. 

The XFCE4 compositing makes the system immediately freeze as soon as I log in
on Manjaro with the 5.2.4-1 kernel.

On the 5.3rc2 kernel, I can enable it and it doesn't immediately hang without
recovery. That said, the compositing doesn't work and we have a lot of
corruption as soon as anything updates on screen.

The "iommu=pt" option didn't do anything for me in regards to reducing the
corruption.

I didn't know which logs to include so I didn't. Send reply with the names and
hopefully, approximate path of any logs to include.