Hello, here is the proposal of my talk. I am not entirely convinced that it fits the microkernel devroom topic list, but let's give it a try. [Title] Graphics Stack for HelenOS [Full Name] Petr Koupý [Short Bio] Petr is a computer science student with interest in operating systems and parallelization. He is more or less involved with several open-source projects, namely Molpher, gerbil.sf.net and HelenOS. For HelenOS, he ported GNU binutils during GSOC'11 and implemented graphics stack to serve as a topic of his diploma thesis. [Abstract] HelenOS was recently equipped with a brand new graphics stack consisting only from in-house developed components among which you can find compositor, drawing library and widget toolkit. While limited in implementation scale, stack components contain enough functionality for live demos and to be practically usable by HelenOS developer community on a daily basis. The talk will mostly focus on various design and implementation decisions influenced by microkernel nature of HelenOS and by current trends in graphics stack design found across both hobbyist and production-grade operating systems. [Estimated duration] 30 minutes + discussion