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== Nvidia card worked until I upgraded to newer Mint / Ubuntu Version ==After an update or upgrade, you might find you are out of luck with your particular Nvidia card.Your Nvidia graphics card may no longer be supported. If so, the open-source nouveau driver is your only option which means you can forget SteamOS or gaming with any real FPS.For example: Nvidia states Support timeframes for Unix legacy GPU releases,"The Linux 340.* legacy driver series is the last to support the G8x, G9x, and GT2xx GPUs, and motherboard chipsets based on them. Support for X.Org xserver version 1.20 was added to the 340.* legacy driver series with version 340.107, and support for Linux kernels up to Linux 5.4 was added with version 340.108. No further releases from the 340.* series are planned."' Mint 21 uses X.Org version 1.21.1.3 (a version newer than 1.20).