When it released the SteamOS 2.154 stable update last month at the end of July, Valve said that the update was kept small intentionally to test the waters before new kernel and graphics stacks upgrades are implemented in a major release of its gaming Linux operating system. A week later, the company published a first beta version of the upcoming major SteamOS release, which rebased the gaming operating system on the Linux 4.16 kernel series with the new Display Core (DC) framework enabled by default for AMD Radeon pre-Vega GPUs in the AMDGPU graphics driver.