Hi, A more detailed bug report can be found at [1].
I have a AMD Renoir system that can't enter graphical session because there are many IOMMU splat. Alex suggested to disable "Pre-boot DMA Protection", I can confirm once it's disabled, AMDGPU starts working with IOMMU enabled. So raise the issue here because I have no knowledge on how to reset the IOMMU. [1] https://gitlab.freedesktop.org/drm/amd/-/issues/1204 Kai-Heng
