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Environment Variables
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=====================
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Normally, no environment variables need to be set. Most of the
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environment variables used by Mesa/Gallium are for debugging purposes,
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but they can sometimes be useful for debugging end-user issues.
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LibGL environment variables
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---------------------------
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``LIBGL_DEBUG``
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If defined debug information will be printed to stderr. If set to
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``verbose`` additional information will be printed.
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``LIBGL_DRIVERS_PATH``
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colon-separated list of paths to search for DRI drivers
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``LIBGL_ALWAYS_INDIRECT``
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if set to ``true``, forces an indirect rendering context/connection.
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``LIBGL_ALWAYS_SOFTWARE``
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if set to ``true``, always use software rendering
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``LIBGL_NO_DRAWARRAYS``
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if set to ``true``, do not use DrawArrays GLX protocol (for
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debugging)
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``LIBGL_SHOW_FPS``
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print framerate to stdout based on the number of ``glXSwapBuffers``
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calls per second.
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``LIBGL_DRI3_DISABLE``
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disable DRI3 if set to ``true``.
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Core Mesa environment variables
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-------------------------------
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``MESA_NO_ASM``
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if set, disables all assembly language optimizations
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``MESA_NO_MMX``
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if set, disables Intel MMX optimizations
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``MESA_NO_3DNOW``
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if set, disables AMD 3DNow! optimizations
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``MESA_NO_SSE``
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if set, disables Intel SSE optimizations
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``MESA_NO_ERROR``
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if set to 1, error checking is disabled as per ``KHR_no_error``. This
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will result in undefined behaviour for invalid use of the api, but
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can reduce CPU use for apps that are known to be error free.
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``MESA_DEBUG``
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if set, error messages are printed to stderr. For example, if the
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application generates a ``GL_INVALID_ENUM`` error, a corresponding
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error message indicating where the error occurred, and possibly why,
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will be printed to stderr. For release builds, ``MESA_DEBUG``
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defaults to off (no debug output). ``MESA_DEBUG`` accepts the
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following comma-separated list of named flags, which adds extra
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behaviour to just set ``MESA_DEBUG=1``:
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``silent``
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turn off debug messages. Only useful for debug builds.
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``flush``
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flush after each drawing command
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``incomplete_tex``
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extra debug messages when a texture is incomplete
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``incomplete_fbo``
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extra debug messages when a fbo is incomplete
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``context``
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create a debug context (see ``GLX_CONTEXT_DEBUG_BIT_ARB``) and
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print error and performance messages to stderr (or
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``MESA_LOG_FILE``).
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``MESA_LOG_FILE``
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specifies a file name for logging all errors, warnings, etc., rather
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than stderr
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``MESA_TEX_PROG``
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if set, implement conventional texture env modes with fragment
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programs (intended for developers only)
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``MESA_TNL_PROG``
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if set, implement conventional vertex transformation operations with
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vertex programs (intended for developers only). Setting this variable
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automatically sets the ``MESA_TEX_PROG`` variable as well.
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``MESA_EXTENSION_OVERRIDE``
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can be used to enable/disable extensions. A value such as
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``GL_EXT_foo -GL_EXT_bar`` will enable the ``GL_EXT_foo`` extension
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and disable the ``GL_EXT_bar`` extension.
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``MESA_EXTENSION_MAX_YEAR``
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The ``GL_EXTENSIONS`` string returned by Mesa is sorted by extension
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year. If this variable is set to year X, only extensions defined on
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or before year X will be reported. This is to work-around a bug in
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some games where the extension string is copied into a fixed-size
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buffer without truncating. If the extension string is too long, the
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buffer overrun can cause the game to crash. This is a work-around for
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that.
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``MESA_GL_VERSION_OVERRIDE``
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changes the value returned by ``glGetString(GL_VERSION)`` and
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possibly the GL API type.
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- The format should be ``MAJOR.MINOR[FC|COMPAT]``
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- ``FC`` is an optional suffix that indicates a forward compatible
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context. This is only valid for versions >= 3.0.
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- ``COMPAT`` is an optional suffix that indicates a compatibility
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context or ``GL_ARB_compatibility`` support. This is only valid
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for versions >= 3.1.
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- GL versions <= 3.0 are set to a compatibility (non-Core) profile
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- GL versions = 3.1, depending on the driver, it may or may not have
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the ``ARB_compatibility`` extension enabled.
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- GL versions >= 3.2 are set to a Core profile
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- Examples:
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``2.1``
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select a compatibility (non-Core) profile with GL version 2.1.
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``3.0``
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select a compatibility (non-Core) profile with GL version 3.0.
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``3.0FC``
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select a Core+Forward Compatible profile with GL version 3.0.
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``3.1``
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select GL version 3.1 with ``GL_ARB_compatibility`` enabled per
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the driver default.
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``3.1FC``
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select GL version 3.1 with forward compatibility and
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``GL_ARB_compatibility`` disabled.
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``3.1COMPAT``
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select GL version 3.1 with ``GL_ARB_compatibility`` enabled.
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``X.Y``
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override GL version to X.Y without changing the profile.
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``X.YFC``
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select a Core+Forward Compatible profile with GL version X.Y.
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``X.YCOMPAT``
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select a Compatibility profile with GL version X.Y.
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- Mesa may not really implement all the features of the given
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version. (for developers only)
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``MESA_GLES_VERSION_OVERRIDE``
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changes the value returned by ``glGetString(GL_VERSION)`` for OpenGL
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ES.
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- The format should be ``MAJOR.MINOR``
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- Examples: ``2.0``, ``3.0``, ``3.1``
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- Mesa may not really implement all the features of the given
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version. (for developers only)
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``MESA_GLSL_VERSION_OVERRIDE``
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changes the value returned by
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``glGetString(GL_SHADING_LANGUAGE_VERSION)``. Valid values are
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integers, such as ``130``. Mesa will not really implement all the
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features of the given language version if it's higher than what's
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normally reported. (for developers only)
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``MESA_GLSL_CACHE_DISABLE``
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if set to ``true``, disables the GLSL shader cache
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``MESA_GLSL_CACHE_MAX_SIZE``
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if set, determines the maximum size of the on-disk cache of compiled
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GLSL programs. Should be set to a number optionally followed by
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``K``, ``M``, or ``G`` to specify a size in kilobytes, megabytes, or
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gigabytes. By default, gigabytes will be assumed. And if unset, a
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maximum size of 1GB will be used. Note: A separate cache might be
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created for each architecture that Mesa is installed for on your
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system. For example under the default settings you may end up with a
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1GB cache for x86_64 and another 1GB cache for i386.
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``MESA_GLSL_CACHE_DIR``
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if set, determines the directory to be used for the on-disk cache of
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compiled GLSL programs. If this variable is not set, then the cache
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will be stored in ``$XDG_CACHE_HOME/mesa_shader_cache`` (if that
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variable is set), or else within ``.cache/mesa_shader_cache`` within
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the user's home directory.
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``MESA_GLSL``
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`shading language compiler options <shading.html#envvars>`__
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``MESA_NO_MINMAX_CACHE``
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when set, the minmax index cache is globally disabled.
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``MESA_SHADER_CAPTURE_PATH``
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see `Capturing Shaders <shading.html#capture>`__
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``MESA_SHADER_DUMP_PATH`` and ``MESA_SHADER_READ_PATH``
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see `Experimenting with Shader
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Replacements <shading.html#replacement>`__
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``MESA_VK_VERSION_OVERRIDE``
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changes the Vulkan physical device version as returned in
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``VkPhysicalDeviceProperties::apiVersion``.
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- The format should be ``MAJOR.MINOR[.PATCH]``
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- This will not let you force a version higher than the driver's
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instance version as advertised by ``vkEnumerateInstanceVersion``
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- This can be very useful for debugging but some features may not be
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implemented correctly. (For developers only)
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NIR passes enviroment variables
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-------------------------------
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The following are only applicable for drivers that uses NIR, as they
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modify the behaviour for the common NIR_PASS and NIR_PASS_V macros, that
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wrap calls to NIR lowering/optimizations.
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``NIR_PRINT``
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If defined, the resulting NIR shader will be printed out at each
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succesful NIR lowering/optimization call.
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``NIR_TEST_CLONE``
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If defined, cloning a NIR shader would be tested at each succesful
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NIR lowering/optimization call.
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``NIR_TEST_SERIALIZE``
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If defined, serialize and deserialize a NIR shader would be tested at
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each succesful NIR lowering/optimization call.
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Mesa Xlib driver environment variables
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--------------------------------------
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The following are only applicable to the Mesa Xlib software driver. See
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the `Xlib software driver page <xlibdriver.html>`__ for details.
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``MESA_RGB_VISUAL``
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specifies the X visual and depth for RGB mode
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``MESA_CI_VISUAL``
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specifies the X visual and depth for CI mode
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``MESA_BACK_BUFFER``
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specifies how to implement the back color buffer, either ``pixmap``
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or ``ximage``
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``MESA_GAMMA``
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gamma correction coefficients for red, green, blue channels
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``MESA_XSYNC``
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enable synchronous X behavior (for debugging only)
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``MESA_GLX_FORCE_CI``
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if set, force GLX to treat 8bpp visuals as CI visuals
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``MESA_GLX_FORCE_ALPHA``
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if set, forces RGB windows to have an alpha channel.
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``MESA_GLX_DEPTH_BITS``
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specifies default number of bits for depth buffer.
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``MESA_GLX_ALPHA_BITS``
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specifies default number of bits for alpha channel.
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i945/i965 driver environment variables (non-Gallium)
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----------------------------------------------------
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``INTEL_NO_HW``
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if set to 1, prevents batches from being submitted to the hardware.
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This is useful for debugging hangs, etc.
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``INTEL_DEBUG``
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a comma-separated list of named flags, which do various things:
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``ann``
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annotate IR in assembly dumps
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``aub``
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dump batches into an AUB trace for use with simulation tools
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``bat``
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emit batch information
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``blit``
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emit messages about blit operations
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``blorp``
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emit messages about the blorp operations (blits & clears)
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``buf``
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emit messages about buffer objects
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``clip``
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emit messages about the clip unit (for old gens, includes the CLIP
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program)
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``color``
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use color in output
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``cs``
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dump shader assembly for compute shaders
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``do32``
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generate compute shader SIMD32 programs even if workgroup size
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doesn't exceed the SIMD16 limit
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``dri``
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emit messages about the DRI interface
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``fbo``
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emit messages about framebuffers
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``fs``
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dump shader assembly for fragment shaders
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``gs``
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dump shader assembly for geometry shaders
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``hex``
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print instruction hex dump with the disassembly
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``l3``
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emit messages about the new L3 state during transitions
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``miptree``
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emit messages about miptrees
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``no8``
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don't generate SIMD8 fragment shader
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``no16``
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suppress generation of 16-wide fragment shaders. useful for
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debugging broken shaders
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``nocompact``
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disable instruction compaction
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``nodualobj``
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suppress generation of dual-object geometry shader code
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``nofc``
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disable fast clears
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``norbc``
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disable single sampled render buffer compression
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``optimizer``
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dump shader assembly to files at each optimization pass and
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iteration that make progress
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``perf``
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emit messages about performance issues
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``perfmon``
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emit messages about ``AMD_performance_monitor``
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``pix``
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emit messages about pixel operations
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``prim``
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emit messages about drawing primitives
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``reemit``
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mark all state dirty on each draw call
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``sf``
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emit messages about the strips & fans unit (for old gens, includes
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the SF program)
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``shader_time``
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record how much GPU time is spent in each shader
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``spill_fs``
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force spilling of all registers in the scalar backend (useful to
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debug spilling code)
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``spill_vec4``
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force spilling of all registers in the vec4 backend (useful to
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debug spilling code)
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``state``
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emit messages about state flag tracking
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``submit``
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emit batchbuffer usage statistics
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``sync``
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after sending each batch, emit a message and wait for that batch
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to finish rendering
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``tcs``
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dump shader assembly for tessellation control shaders
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``tes``
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dump shader assembly for tessellation evaluation shaders
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``tex``
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emit messages about textures.
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``urb``
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emit messages about URB setup
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``vert``
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emit messages about vertex assembly
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``vs``
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dump shader assembly for vertex shaders
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``INTEL_SCALAR_VS`` (or ``TCS``, ``TES``, ``GS``)
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force scalar/vec4 mode for a shader stage (Gen8-9 only)
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``INTEL_PRECISE_TRIG``
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if set to 1, true or yes, then the driver prefers accuracy over
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performance in trig functions.
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Radeon driver environment variables (radeon, r200, and r300g)
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-------------------------------------------------------------
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``RADEON_NO_TCL``
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if set, disable hardware-accelerated Transform/Clip/Lighting.
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EGL environment variables
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-------------------------
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Mesa EGL supports different sets of environment variables. See the `Mesa
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EGL <egl.html>`__ page for the details.
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Gallium environment variables
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-----------------------------
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``GALLIUM_HUD``
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draws various information on the screen, like framerate, cpu load,
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driver statistics, performance counters, etc. Set
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``GALLIUM_HUD=help`` and run e.g. ``glxgears`` for more info.
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``GALLIUM_HUD_PERIOD``
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sets the hud update rate in seconds (float). Use zero to update every
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frame. The default period is 1/2 second.
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``GALLIUM_HUD_VISIBLE``
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control default visibility, defaults to true.
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``GALLIUM_HUD_TOGGLE_SIGNAL``
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toggle visibility via user specified signal. Especially useful to
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toggle hud at specific points of application and disable for
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unencumbered viewing the rest of the time. For example, set
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``GALLIUM_HUD_VISIBLE`` to ``false`` and
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``GALLIUM_HUD_TOGGLE_SIGNAL`` to ``10`` (``SIGUSR1``). Use
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``kill -10 <pid>`` to toggle the hud as desired.
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``GALLIUM_HUD_SCALE``
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Scale hud by an integer factor, for high DPI displays. Default is 1.
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``GALLIUM_HUD_DUMP_DIR``
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specifies a directory for writing the displayed hud values into
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files.
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``GALLIUM_DRIVER``
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useful in combination with ``LIBGL_ALWAYS_SOFTWARE=true`` for
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choosing one of the software renderers ``softpipe``, ``llvmpipe`` or
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``swr``.
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``GALLIUM_LOG_FILE``
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specifies a file for logging all errors, warnings, etc. rather than
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stderr.
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``GALLIUM_PRINT_OPTIONS``
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if non-zero, print all the Gallium environment variables which are
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used, and their current values.
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``GALLIUM_DUMP_CPU``
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if non-zero, print information about the CPU on start-up
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``TGSI_PRINT_SANITY``
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if set, do extra sanity checking on TGSI shaders and print any errors
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to stderr.
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``DRAW_FSE``
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???
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``DRAW_NO_FSE``
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???
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``DRAW_USE_LLVM``
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if set to zero, the draw module will not use LLVM to execute shaders,
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vertex fetch, etc.
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``ST_DEBUG``
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controls debug output from the Mesa/Gallium state tracker. Setting to
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``tgsi``, for example, will print all the TGSI shaders. See
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``src/mesa/state_tracker/st_debug.c`` for other options.
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Clover environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``CLOVER_EXTRA_BUILD_OPTIONS``
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allows specifying additional compiler and linker options. Specified
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options are appended after the options set by the OpenCL program in
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``clBuildProgram``.
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``CLOVER_EXTRA_COMPILE_OPTIONS``
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allows specifying additional compiler options. Specified options are
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appended after the options set by the OpenCL program in
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``clCompileProgram``.
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``CLOVER_EXTRA_LINK_OPTIONS``
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allows specifying additional linker options. Specified options are
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appended after the options set by the OpenCL program in
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``clLinkProgram``.
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Softpipe driver environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``SOFTPIPE_DUMP_FS``
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if set, the softpipe driver will print fragment shaders to stderr
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``SOFTPIPE_DUMP_GS``
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if set, the softpipe driver will print geometry shaders to stderr
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``SOFTPIPE_NO_RAST``
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if set, rasterization is no-op'd. For profiling purposes.
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``SOFTPIPE_USE_LLVM``
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if set, the softpipe driver will try to use LLVM JIT for vertex
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shading processing.
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LLVMpipe driver environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``LP_NO_RAST``
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if set LLVMpipe will no-op rasterization
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``LP_DEBUG``
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a comma-separated list of debug options is accepted. See the source
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code for details.
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``LP_PERF``
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a comma-separated list of options to selectively no-op various parts
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of the driver. See the source code for details.
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``LP_NUM_THREADS``
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an integer indicating how many threads to use for rendering. Zero
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turns off threading completely. The default value is the number of
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CPU cores present.
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VMware SVGA driver environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``SVGA_FORCE_SWTNL``
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force use of software vertex transformation
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``SVGA_NO_SWTNL``
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don't allow software vertex transformation fallbacks (will often
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result in incorrect rendering).
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``SVGA_DEBUG``
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for dumping shaders, constant buffers, etc. See the code for details.
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``SVGA_EXTRA_LOGGING``
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if set, enables extra logging to the ``vmware.log`` file, such as the
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OpenGL program's name and command line arguments.
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``SVGA_NO_LOGGING``
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if set, disables logging to the ``vmware.log`` file. This is useful
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when using Valgrind because it otherwise crashes when initializing
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the host log feature.
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See the driver code for other, lesser-used variables.
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WGL environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~
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``WGL_SWAP_INTERVAL``
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to set a swap interval, equivalent to calling
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``wglSwapIntervalEXT()`` in an application. If this environment
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variable is set, application calls to ``wglSwapIntervalEXT()`` will
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have no effect.
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VA-API environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``VAAPI_MPEG4_ENABLED``
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enable MPEG4 for VA-API, disabled by default.
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VC4 driver environment variables
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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``VC4_DEBUG``
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|
a comma-separated list of named flags, which do various things:
|
|
|
|
``cl``
|
|
dump command list during creation
|
|
``qpu``
|
|
dump generated QPU instructions
|
|
``qir``
|
|
dump QPU IR during program compile
|
|
``nir``
|
|
dump NIR during program compile
|
|
``tgsi``
|
|
dump TGSI during program compile
|
|
``shaderdb``
|
|
dump program compile information for shader-db analysis
|
|
``perf``
|
|
print during performance-related events
|
|
``norast``
|
|
skip actual hardware execution of commands
|
|
``always_flush``
|
|
flush after each draw call
|
|
``always_sync``
|
|
wait for finish after each flush
|
|
``dump``
|
|
write a GPU command stream trace file (VC4 simulator only)
|
|
|
|
RADV driver environment variables
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
``RADV_DEBUG``
|
|
a comma-separated list of named flags, which do various things:
|
|
|
|
``allbos``
|
|
force all allocated buffers to be referenced in submissions
|
|
``allentrypoints``
|
|
enable all device/instance entrypoints
|
|
``checkir``
|
|
validate the LLVM IR before LLVM compiles the shader
|
|
``errors``
|
|
display more info about errors
|
|
``info``
|
|
show GPU-related information
|
|
``metashaders``
|
|
dump internal meta shaders
|
|
``nobinning``
|
|
disable primitive binning
|
|
``nocache``
|
|
disable shaders cache
|
|
``nocompute``
|
|
disable compute queue
|
|
``nodcc``
|
|
disable Delta Color Compression (DCC) on images
|
|
``nodynamicbounds``
|
|
do not check OOB access for dynamic descriptors
|
|
``nofastclears``
|
|
disable fast color/depthstencil clears
|
|
``nohiz``
|
|
disable HIZ for depthstencil images
|
|
``noibs``
|
|
disable directly recording command buffers in GPU-visible memory
|
|
``noloadstoreopt``
|
|
disable LLVM SILoadStoreOptimizer pass
|
|
``nomemorycache``
|
|
disable memory shaders cache
|
|
``nongg``
|
|
disable NGG for GFX10+
|
|
``nooutoforder``
|
|
disable out-of-order rasterization
|
|
``noshaderballot``
|
|
disable shader ballot
|
|
``nothreadllvm``
|
|
disable LLVM threaded compilation
|
|
``preoptir``
|
|
dump LLVM IR before any optimizations
|
|
``shaders``
|
|
dump shaders
|
|
``shaderstats``
|
|
dump shader statistics
|
|
``spirv``
|
|
dump SPIR-V
|
|
``startup``
|
|
display info at startup
|
|
``syncshaders``
|
|
synchronize shaders after all draws/dispatches
|
|
``vmfaults``
|
|
check for VM memory faults via dmesg
|
|
``zerovram``
|
|
initialize all memory allocated in VRAM as zero
|
|
|
|
``RADV_FORCE_FAMILY``
|
|
create a null device to compile shaders without a AMD GPU (eg.
|
|
gfx900)
|
|
``RADV_PERFTEST``
|
|
a comma-separated list of named flags, which do various things:
|
|
|
|
``aco``
|
|
enable ACO experimental compiler
|
|
``bolist``
|
|
enable the global BO list
|
|
``cswave32``
|
|
enable wave32 for compute shaders (GFX10+)
|
|
``dccmsaa``
|
|
enable DCC for MSAA images
|
|
``dfsm``
|
|
enable dfsm
|
|
``gewave32``
|
|
enable wave32 for vertex/tess/geometry shaders (GFX10+)
|
|
``localbos``
|
|
enable local BOs
|
|
``pswave32``
|
|
enable wave32 for pixel shaders (GFX10+)
|
|
``shader_ballot``
|
|
enable shader ballot
|
|
``tccompatcmask``
|
|
enable TC-compat cmask for MSAA images
|
|
|
|
``RADV_SECURE_COMPILE_THREADS``
|
|
maximum number of secure compile threads (up to 32)
|
|
``RADV_TEX_ANISO``
|
|
force anisotropy filter (up to 16)
|
|
``RADV_TRACE_FILE``
|
|
generate cmdbuffer tracefiles when a GPU hang is detected
|
|
``ACO_DEBUG``
|
|
a comma-separated list of named flags, which do various things:
|
|
|
|
``validateir``
|
|
validate the ACO IR at various points of compilation (enabled by
|
|
default for debug/debugoptimized builds)
|
|
``validatera``
|
|
validate register assignment of ACO IR and catches many RA bugs
|
|
``perfwarn``
|
|
abort on some suboptimal code generation
|
|
|
|
radeonsi driver environment variables
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
``AMD_DEBUG``
|
|
a comma-separated list of named flags, which do various things:
|
|
``nodma``
|
|
Disable SDMA
|
|
``nodmaclear``
|
|
Disable SDMA clears
|
|
``nodmacopyimage``
|
|
Disable SDMA image copies
|
|
``zerovram``
|
|
Clear VRAM allocations.
|
|
``nodcc``
|
|
Disable DCC.
|
|
``nodccclear``
|
|
Disable DCC fast clear.
|
|
``nodccfb``
|
|
Disable separate DCC on the main framebuffer
|
|
``nodccmsaa``
|
|
Disable DCC for MSAA
|
|
``nodpbb``
|
|
Disable DPBB.
|
|
``nodfsm``
|
|
Disable DFSM.
|
|
``notiling``
|
|
Disable tiling
|
|
``nofmask``
|
|
Disable MSAA compression
|
|
``nohyperz``
|
|
Disable Hyper-Z
|
|
``norbplus``
|
|
Disable RB+.
|
|
``no2d``
|
|
Disable 2D tiling
|
|
``info``
|
|
Print driver information
|
|
``tex``
|
|
Print texture info
|
|
``compute``
|
|
Print compute info
|
|
``vm``
|
|
Print virtual addresses when creating resources
|
|
``vs``
|
|
Print vertex shaders
|
|
``ps``
|
|
Print pixel shaders
|
|
``gs``
|
|
Print geometry shaders
|
|
``tcs``
|
|
Print tessellation control shaders
|
|
``tes``
|
|
Print tessellation evaluation shaders
|
|
``cs``
|
|
Print compute shaders
|
|
``noir``
|
|
Don't print the LLVM IR
|
|
``nonir``
|
|
Don't print NIR when printing shaders
|
|
``noasm``
|
|
Don't print disassembled shaders
|
|
``preoptir``
|
|
Print the LLVM IR before initial optimizations
|
|
``gisel``
|
|
Enable LLVM global instruction selector.
|
|
``w32ge``
|
|
Use Wave32 for vertex, tessellation, and geometry shaders.
|
|
``w32ps``
|
|
Use Wave32 for pixel shaders.
|
|
``w32cs``
|
|
Use Wave32 for computes shaders.
|
|
``w64ge``
|
|
Use Wave64 for vertex, tessellation, and geometry shaders.
|
|
``w64ps``
|
|
Use Wave64 for pixel shaders.
|
|
``w64cs``
|
|
Use Wave64 for computes shaders.
|
|
``checkir``
|
|
Enable additional sanity checks on shader IR
|
|
``mono``
|
|
Use old-style monolithic shaders compiled on demand
|
|
``nooptvariant``
|
|
Disable compiling optimized shader variants.
|
|
``forcedma``
|
|
Use SDMA for all operations when possible.
|
|
``nowc``
|
|
Disable GTT write combining
|
|
``check_vm``
|
|
Check VM faults and dump debug info.
|
|
``reserve_vmid``
|
|
Force VMID reservation per context.
|
|
``nogfx``
|
|
Disable graphics. Only multimedia compute paths can be used.
|
|
``nongg``
|
|
Disable NGG and use the legacy pipeline.
|
|
``nggc``
|
|
Always use NGG culling even when it can hurt.
|
|
``nonggc``
|
|
Disable NGG culling.
|
|
``alwayspd``
|
|
Always enable the primitive discard compute shader.
|
|
``pd``
|
|
Enable the primitive discard compute shader for large draw calls.
|
|
``nopd``
|
|
Disable the primitive discard compute shader.
|
|
``switch_on_eop``
|
|
Program WD/IA to switch on end-of-packet.
|
|
``nooutoforder``
|
|
Disable out-of-order rasterization
|
|
``dpbb``
|
|
Enable DPBB.
|
|
``dfsm``
|
|
Enable DFSM.
|
|
|
|
Other Gallium drivers have their own environment variables. These may
|
|
change frequently so the source code should be consulted for details.
|