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SubjectRe: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems
On Fri, Nov 29, 2019 at 10:21:54PM +0800, Kai-Heng Feng wrote:
> Serious screen flickering when Stoney Ridge outputs to a 4K monitor.
> According to Alex Deucher, IOMMU isn't enabled on Windows, so let's do
> the same here to avoid screen flickering on 4K monitor.

Disabling the IOMMU entirely seem pretty severe. Isn't it enough to
identity map the GPU device?

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