[regression, bisected, pci/iommu] Bug 216865 - Black screen when amdgpu started during 6.2-rc1 boot with AMD IOMMU enabled

[Jason Gunthorpe]

On Tue, Jan 10, 2023 at 02:45:30PM +0100, Christian König wrote:

> Since this is a device integrated in the CPU it could be that the ACS/ATS
> functionalities are controlled by the BIOS and can be enabled/disabled
> there. But this should always enable/disable both.

This sounds like a GPU driver bug then, it should tolerate PASID being
unavailable because of BIOS issues/whatever and not black screen on
boot?

Jason