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mga - Matrox video driver
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 <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
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 oqG200 and latercq chips, for example.
Please refer to xorg.conf(5)
for general configuration details. This
section only covers configuration details specific to this driver.
- Millennium II
- Productiva G100
- Millennium G200 and Mystique
- Millennium G400, Millennium G400 MAX, Millennium G450, and Marvel
- Millennium G550 and Millennium G550 Dual DVI
auto-detects the chipset type, but the following ChipSet names may optionally
be specified in the config file "Device" section, and will override the
"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:
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.
- 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"
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
- 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
- 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"
- 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.
- 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
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:
- 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:
- 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.
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