See, , Xorg#Installation, and modesetting(4). Note: Some ( Debian & Ubuntu, Fedora, KDE) recommend not installing the xf86-video-intel driver, and instead falling back on the modesetting driver for Gen 4 and newer hardware.
For Vulkan support ( Ivy Bridge and newer), install the vulkan-intel package. Beside this functionality, this package is generally not recommended, see note below. For the DDX driver which provides 2D acceleration in Xorg, install the xf86-video-intel package. For 32-bit application support, also install the lib32-mesa or lib32-mesa-amber package from the multilib repository. This driver has better performance and stability for Gen 7 and older hardware. 
mesa-amber is the legacy Mesa package which includes the classic (non-Gallium3D) drivers for Gen 2 hardware and later. This is the recommended choice for Gen 8 and later hardware. mesa is the up-to-date Mesa package which includes the modern Gallium3D drivers for Intel's Gen 3 hardware and later. Install one of the following packages, which provide the DRI driver for 3D acceleration. 
See Xorg#Driver installation to identify your card.Intel's Gen N hardware does not refer to the generation of the CPU, it refers to the generation of the GPU, which is different from the generation of the CPU.
PowerVR-based graphics ( GMA 3600 series) are not supported by open source drivers.
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