Enthusiast hacks Valve’s AMD-first gaming OS to run on Intel hardware — SteamOS boots on Intel Arc B580 desktop GPU, but it takes a Radeon card, installer workaround, and Resizable BAR fix
… However, because the underlying Linux graphics driver is shared, the same Mesa stack that targets Intel handheld chips also recognizes a desktop Arc GPU. SaperPL's system reported the card as Mesa Intel Arc B580 Graphics BMG G21 on Mesa 26.1.2, running SteamOS 3.9. …