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 supported for depth 8, and both  True-
       Color  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 Tex-
       turedVideo  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 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 "NoHal" "boolean"
              Disable or enable loading the "mga_hal" module.  Default: the module is loaded when available and when using hard-
              ware 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 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  fur-
              ther 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  pur-
              poses, 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 1.4.11                                               mga(4)