On 2020-06-01 20:44, Stefan Pietsch wrote:
Affected is at least linux-image-5.6.0-1-amd64 (5.6.7-1) and linux-image-5.6.0-2-amd64 (5.6.14-1).
This also affects 5.5.0-rc5-amd64. (https://snapshot.debian.org/archive/debian/20200106T211159Z/pool/main/l/linux/) The kernel boot option "intel_iommu=igfx_off" prevents the error message.
