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siliconmotion(4)	   Kernel Interfaces Manual	      siliconmotion(4)

       siliconmotion - Silicon Motion video driver

       Section "Device"
	 Identifier "devname"
	 Driver	"siliconmotion"
	 [ Option "optionname" ["optionvalue"]]

       siliconmotion  is  an  XFree86  driver  for  Silicon Motion based video
       cards.  The driver is fully accelerated,	and provides support  for  the
       following framebuffer depths: 8,	16, and	24.  All visual	types are sup-
       ported for depth	8, and TrueColor visuals are supported for  the	 other

       The  siliconmotion driver supports PCI and AGP video cards based	on the
       following Silicon Motion	chips:

       Lynx	   SM910

       LynxE	   SM810

       Lynx3D	   SM820

       LynxEM	   SM710

       LynxEM+	   SM712

       Lynx3DM	   SM720

       Cougar3DR   SM730

       Please refer to XF86Config(5) for general configuration details.	  This
       section only covers configuration details specific to this driver.  All
       options names are case and white	space insensitive when parsed  by  the
       server, for example,  "lynxe" and "LynxE" are equivalent.

       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:

	   "lynx",   "lynxe",	"lynx3d",   "lynxem",	"lynxem+",  "lynx3dm",

       The following Cursor Options are	supported:

       Option "HWCursor" "boolean"
	      Enable or	disable	the HW cursor.	Default: on.

       Option "SWCursor" "boolean"
	      Inverse of "HWCursor".  Default: off.

       The following display Options are supported:

       Option "ShadowFB" "boolean"
	      Use shadow framebuffer.  Default:	off.

       Option "Rotate" "CW"

       Option "Rotate" "CCW"
	      Rotate the screen	CW - clockwise or  CCW	-  counter  clockwise.
	      Uses ShadowFB.  Default: no rotation.

       Option "VideoKey" "integer"
	      Set the video color key.	Default: a little off full blue.

       Option "ByteSwap" "boolean"
	      Turn  on	byte swapping for capturing using SMI demo board.  De-
	      fault: off.

       Option "Interlaced" "boolean"
	      Turn on interlaced video capturing.  Default: off.

       Option "UseBIOS"	"boolean"
	      Use the BIOS to set the modes. This is  used  for	 custom	 panel
	      timings.	Default: on.

       Option "ZoomOnLCD" "boolean"
	      Allow changing resolution	on LCD (Ctrl-Alt-Plus and Ctrl-Alt-Mi-
	      nus).  Default: off.

       The following video memory Options are supported:

       Option "set_mclk" "integer"
	      sets the memory clock, where integer is in kHz, and  integer  <=
	      100000.	Default:  probe	 the memory clock value, and use it at
	      server start.

       The following acceleration and graphics engine Options are supported:

       Option "NoAccel"
	      Disable acceleration.  Very useful for determining if the	driver
	      has  problems  with  drawing and acceleration routines.  This is
	      the first	option to try if your server runs but you see  graphic
	      corruption on the	screen.	 Using it decreases performance, as it
	      uses software emulation for drawing operations the video	driver
	      can accelerate with hardware.  Default: acceleration is enabled.

       Option "fifo_aggressive"

       Option "fifo_moderate"

       Option "fifo_conservative"
	      alter  the  settings  for	 the threshold at which	the pixel FIFO
	      takes over the internal memory bus to refill itself. The smaller
	      this  threshold,	the better the acceleration performance	of the
	      card. You	may try	the fastest setting (fifo_aggressive) and move
	      down  if	you  encounter	pixel corruption.  The optimal setting
	      will probably depend on dot-clock	and on color depth. Note  that
	      specifying  any  of  these  options will also alter other	memory
	      settings which may increase performance, so trying  fifo_conser-
	      vative  will  in	most  cases be a slight	benefit	(this uses the
	      chip defaults).  If pixel	corruption or transient	 streaking  is
	      observed	during	drawing	 operations then removing any fifo op-
	      tions is recommended.  Default: none.

       The following PCI bus Options are supported:

       Option "pci_burst" "boolean"
	      will enable PCI burst mode. This should work on all  but	a  few
	      broken  PCI  chipsets,  and will increase	performance.  Default:

       Option "pci_retry" "boolean"
	      will allow the driver to rely on PCI Retry to program the	 ViRGE
	      registers.   pci_burst  must  be enabled for this	to work.  This
	      will increase performance, especially for	small fills/blits, be-
	      cause  the driver	does not have to poll the ViRGE	before sending
	      it commands to make sure it is ready. It should work on most re-
	      cent PCI chipsets.  Default: off.

       The following additional	Options	are supported:

       Option "ShowCache" "boolean"
	      Enable or	disable	viewing	offscreen cache	memory.	 A development
	      debug option.  Default: off.

       XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

       For assistance with this	driver,	 or  XFree86  in  general,  check  the
       XFree86	web site at  A FAQ is available	on the
       web site	at	 If you	find  a	 problem  with
       XFree86	or  have a question not	answered in the	FAQ please use our bug
       report  form  available	 on   the   web	  site	 or   send   mail   to   When  reporting problems with the	driver send as
       much detail as possible,	including chipset type,	a server  output  log,
       and operating system specifics.

       Kevin  Brosius,	Matt Grossman, Harald Koenig, Sebastien	Marineau, Mark
       Vojkovich, Frido	Garritsen, Corvin Zahn.

XFree86				 Version 4.4.0		      siliconmotion(4)


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