On 10/10/17 08:58 AM, Christian König wrote: > As Nicolai explained that approach simply won't work. > > The fd is used by more than just the closed source Vulkan driver and I > think even by some components not developed by AMD (common X code? > Michel please comment as well). The only thing that comes to mind possibly matching your description is the generic modesetting Xorg driver, but that only calls KMS API ioctls. Command submission and memory management ioctls should only be called by hardware specific userspace code. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer