Provided by: xserver-xorg-video-mga-lts-vivid_1.6.3-2ubuntu1~trusty1_amd64 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.  Support for the second head on G400
       cards  requires  a  binary-only  "mga_hal"  module   that   is   available   from   Matrox
       <>,  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).


       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:

       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:

       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 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:

       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.