NAME

       mga - Matrox video driver

SYNOPSIS

       Section "Device"
         Identifier "devname"
         Driver "mga"
         ...
       EndSection

DESCRIPTION

       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.

SUPPORTED HARDWARE

       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.

       MGA2064W

       MGA1064SG
              Mystique

       MGA2164W
              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

CONFIGURATION DETAILS

       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: auto-detected.

       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 "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: off.

       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.

SEE ALSO

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

AUTHORS

       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.