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Linux KMS Mode

Purpose

KMS (Kernel Mode Setting) mode is a feature where RetroArch can use the OpenGL or Vulkan driver outside Xorg/Wayland, running straight in the virtual terminal. It is a fairly obscure feature, but very powerful in a console scenario.

Requirements

To use KMS mode you need:

  • MESA version 9.0+ (including dev package)
  • Use of Vulkan requires KHR_Display extension, present from Mesa 21 onwards
  • libgbm 9.0+, libdrm (including dev package)
  • Open source driver which supports KMS
  • ./configure with flags "--enable-kms" and "--enable-egl"

After compiling RetroArch, you should see this when running retroarch --features:

1
2
KMS:
    KMS/EGL context support: yes

If KMS mode is working correctly, RetroArch should start up without any desktop environment as well, straight from the terminal.