https://bugs.freedesktop.org/show_bug.cgi?id=108992
--- Comment #14 from chris christian.frank.uwb@googlemail.com --- I can confirm that the iommu=pt workaround works, also iommu=soft works to get gdm started and use the laptop. Sadly i have no idea what impact those workarounds have when it comes to performance of the gpu/cpu or battery lifetime ?