Valve pushed a new beta version of its Debian-based SteamOS Linux operating system to the brewmaster_beta channel for public testing, updating the graphics stacks like it promised last month. 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.

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