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mga(4)									mga(4)

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 sup‐
       ported for depth 8, and both TrueColor and DirectColor visuals are sup‐
       ported  for  the	 other	depths except 8+24 mode which supports Pseudo‐
       Color, GrayScale and TrueColor.	 Multi-card  configurations  are  sup‐
       ported.	 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  <http://www.matrox.com>, 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).

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  Mar‐
	      vel 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  configura‐
	      tions.  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 "NoHal" "boolean"
	      Disable  or  enable  loading the "mga_hal" module.  Default: the
	      module is loaded when available and when using hardware that  it
	      supports.

       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 sig‐
	      nal.  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.

X Version 11		     xf86-video-mga 1.6.2			mga(4)
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