Provided by: xserver-xorg-video-mga_1.6.4-1build2_i386 bug


       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.


       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: auto-detected.

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

       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:

       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.