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mga - Matrox video driver
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 sup-
ported for depth 8, and both TrueColor and DirectColor visuals are sup-
ported for the other depths except 8+24 mode which supports Pseudo-
Color, GrayScale and TrueColor. Multi-card configurations are sup-
ported. 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
MGA2064W Millennium (original)
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
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 configura-
tions. 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
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. Rec-
ognized values are: "8,24", "24,8". Default: off. (Note: the
G100 is unaccelerated in the 8+24 overlay mode due to a missing
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 sig-
nal. 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.
Option "VideoKey" "integer"
This sets the default pixel value for the YUV video overlay key.
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.
4.5.0 XFree86 MGA(4)