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

FreeBSD Manual Pages


home | help
MGA(4)			   Kernel Interfaces Manual			MGA(4)

       mga - Matrox video driver

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

       mga  is an Xorg driver for Matrox video cards.  The driver is fully ac-
       celerated, 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  <>,	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 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 op-
	      tion will	often need to be  specified  in	 multihead  configura-
	      tions.  Default: auto-detected.

       Option "NoAccel"	"boolean"
	      Disable  or  enable  acceleration.  Default: acceleration	is en-

       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.  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
	      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 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.
	      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.

       Xorg(1),	xorg.conf(5), xorgconfig(1), Xserver(1), X(7)

       Authors include:	Radoslaw  Kapitan,  Mark  Vojkovich,  and  also	 David
       Dawes,  Guy Desbief, Dirk Hohndel, Doug Merritt,	Andrew E. Mileski, An-
       drew van	der Stock, Leonard N. Zubkoff, Andrew C. Aitchison.

X.Org				 Version 6.7.0				MGA(4)


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

home | help