Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
MGA(4)                 FreeBSD Kernel Interfaces Manual                 MGA(4)

       mga - Matrox video driver

       Section "Device"
         Identifier "devname"
         Driver "mga"

       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 <>, 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

       The mga driver supports PCI and AGP video cards based on the following
       Matrox chips:

       MGA2064W    Millennium (original)

       MGA1064SG   Mystique

       MGA2164W    Millennium II


       G200        Millennium G200 and Mystique G200




       Please refer to XF86Config(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 "NoHal" "boolean"
              Disable or enable loading the "mga_hal" module.  Default: the
              module is loaded when available and when using hardware that it

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

       Option "Overlay" "value"
              Enable 8+24 overlay mode.  Only appropriate for depth 24.
              Recognized values are: "8,24", "24,8". Default: off.  (Note: the
              G100 is unaccelerated in the 8+24 overlay mode due to a missing
              hardware feature.)

       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 the G200 and
              G400, and only in 16 and 32 bits per pixel.  Default: off.

       XFree86(1), XF86Config(5), xf86config(1), 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.

XFree86                          Version 4.7.0                          MGA(4)


Want to link to this manual page? Use this URL:

home | help