mga(4)                      Kernel Interfaces Manual                      mga(4)

       mga - Matrox video driver

       Section "Device"
         Identifier "devname"
         Driver "mga"

       mga is an Xorg driver for Matrox video cards.  The driver is fully
       accelerated, and provides support for the following framebuffer depths:
       8, 15, 16, 24, and an 8+24 overlay mode.  All visual types are supported
       for depth 8, and both TrueColor and DirectColor visuals are supported for
       the other depths except 8+24 mode which supports PseudoColor, GrayScale
       and TrueColor.  Multi-card configurations are supported.  XVideo is
       supported on G200 and newer systems, with either TexturedVideo or video
       overlay.  The second head of dual-head cards is supported for the G450
       and G550.  Support for the second head on G400 cards requires a
       binary-only "mga_hal" module that is available from Matrox
       <>, and may be on the CD supplied with the card.
       That module also provides various other enhancements, and may be
       necessary to use the DVI (digital) output on the G550 (and other cards).

       The mga driver supports PCI and AGP video cards based on the following
       Matrox chips.  They are listed in approximate chronological order of
       production (with the most recent chipsets listed last), so consult this
       list when you are unsure whether your card is meant when references are
       made to ‘G200 and later’ chips, for example.



              Millennium II

       G100   Productiva G100

       G200   Millennium G200 and Mystique G200

       G400   Millennium G400, Millennium G400 MAX, Millennium G450, and Marvel
              G450 eTV

       G550   Millennium G550 and Millennium G550 Dual DVI

       Please refer to xorg.conf(5) for general configuration details.  This
       section only covers configuration details specific to this driver.

       The driver auto-detects the chipset type, but the following ChipSet names
       may optionally be specified in the config file "Device" section, and will
       override the auto-detection:

           "mga2064w", "mga1064sg", "mga2164w", "mga2164w agp", "mgag100",
           "mgag200", "mgag200 pci", "mgag400", "mgag550".

       The G450 is Chipset "mgag400" with ChipRev 0x80.

       The driver will auto-detect the amount of video memory present for all
       chips except the Millennium II.  In the Millennium II case it defaults to
       4096 kBytes.  When using a Millennium II, the actual amount of video
       memory should be specified with a VideoRam entry in the config file
       "Device" section.

       The following driver Options are supported:

       Option "ColorKey" "integer"
              Set the colormap index used for the transparency key for the depth
              8 plane when operating in 8+24 overlay mode.  The value must be in
              the range 2-255.  Default: 255.

       Option "HWCursor" "boolean"
              Enable or disable the HW cursor.  Default: on.

       Option "MGASDRAM" "boolean"
              Specify whether G100, G200 or G400 cards have SDRAM.  The driver
              attempts to auto-detect this based on the card's PCI subsystem ID.
              This option may be used to override that auto-detection.  The mga
              driver is not able to auto-detect the presence of of SDRAM on
              secondary heads in multihead configurations so this option will
              often need to be specified in multihead configurations.  Default:

       Option "NoAccel" "boolean"
              Disable or enable acceleration.  Default: acceleration is enabled.

       Option "AccelMethod" "string"
              Chooses between available acceleration architectures.  Valid
              options are XAA and EXA.  XAA is the traditional acceleration
              architecture and support for it is very stable.  EXA is a newer
              acceleration architecture with better performance for the Render
              and Composite extensions, but the rendering code for it is newer
              and possibly unstable.  The default is XAA.

       Option "NoHal" "boolean"
              Disable or enable loading the "mga_hal" module.  Default: the
              module is loaded when available and when using hardware that it

       Option "OverclockMem"
              Set clocks to values used by some commercial X Servers (G100, G200
              and G400 only).  Default: off.

       Option "PciRetry" "boolean"
              Enable or disable PCI retries.  Default: off.

       Option "Rotate" "CW"

       Option "Rotate" "CCW"
              Rotate the display clockwise or counterclockwise.  This mode is
              unaccelerated.  Default: no rotation.

       Option "ShadowFB" "boolean"
              Enable or disable use of the shadow framebuffer layer.  Default:

       Option "SyncOnGreen" "boolean"
              Enable or disable combining the sync signals with the green
              signal.  Default: off.

       Option "UseFBDev" "boolean"
              Enable or disable use of on OS-specific fb interface (and is not
              supported on all OSs).  See fbdevhw(4) for further information.
              Default: off.

       Option "VideoKey" "integer"
              This sets the default pixel value for the YUV video overlay key.
              Default: undefined.

       Option "TexturedVideo" "boolean"
              This has XvImage support use the texture engine rather than the
              video overlay.  This option is only supported by G200 and later
              chips, and only at 16 and 32 bits per pixel.  Default: off.

       Option "OldDmaInit" "boolean"
              This forces the driver to use the old DMA initialization path for
              DRI.  Use this option only to support a older version of the DRI
              driver with a newer DRM (version 3.2 or later).  This option also
              disables the use of direct rendering on PCI cards.  Default: off.

       Option "ForcePciDma" "boolean"
              This forces the use of PCI DMA even if AGP DMA could be used.
              This option is primarily intended for testing purposes, but it
              could also be used on systems with a buggy or poorly function AGP
              implementation.  Default: off.

       Xorg(1), xorg.conf(5), Xserver(1), X(7)

       Authors include: Radoslaw Kapitan, Mark Vojkovich, and also David Dawes,
       Guy Desbief, Dirk Hohndel, Doug Merritt, Andrew E. Mileski, Andrew van
       der Stock, Leonard N. Zubkoff, Andrew C. Aitchison.

X Version 11                  xf86-video-mga 1.6.3                        mga(4)