MGA(4x) 																   MGA(4x)

NAME

       mga - Matrox video driver

SYNOPSIS

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

DESCRIPTION

       mga  is	an  XFree86  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 <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:

       MGA2064W    Millennium (original)

       MGA1064SG   Mystique

       MGA2164W    Millennium II

       G100

       G200	   Millennium G200 and Mystique G200

       G400

       G450

       G550

CONFIGURATION DETAILS

       Please refer to XF86Config(5x) 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 sec-
	      ondary 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 "NoHal" "boolean"
	      Disable or enable loading the "mga_hal" module.  Default: the module is loaded when available and when using hardware that  it  sup-
	      ports.

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

       Option "Overlay"
	      Enable  8+24 overlay mode.  Only appropriate for depth 24.  (Note: the G100 is unaccelerated in the 8+24 overlay mode due to a miss-
	      ing hardware feature.) 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(4x)	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 the G200 and G400,
	      and only in 16 and 32 bits per pixel.  Default: off.

SEE ALSO

       XFree86(1), XF86Config(5x), xf86config(1), Xserver(1), X(7x)

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.

XFree86 						       Version Version 4.3.0							   MGA(4x)