[bdw-u iommu] DMAR error -> GPU hang
Submitted by Stefan Junker
Assigned to Joonas Lahtinen
Created attachment 113867
The system randomly freezes and doesn't react to anything afterwards. Not even the magic keys can reboot the system.
Processor model is Intel Core-i7 5500U with the integrated GPU.
Kernel version is 4.0.0-rc1, which is required to even get X / gdm working with the system.
I've attached the kernel log messages which shows an instance of this problem.
Please request any information needed and I'll happily provide it.
Attachment 113867, "kernel log":