Explore the current state of graphics virtualization in upstream Linux through this 36-minute conference talk by Daniel Stone from Collabora. Dive into the challenges faced by the Linux graphics subsystem, which has traditionally relied on 'implicit synchronisation' for coherence and kernel-handled scheduling. Understand how modern hardware's shift towards giving userspace exacting control has made implicit synchronisation less viable. Examine the ongoing efforts in open source graphics solutions for containerized and virtualized workloads. Learn about API, Vulkan, and OpenGL virtualization as the talk progresses through topics including introduction, context, implementation details, and specific virtualization techniques.