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siliconmotion(4)       FreeBSD 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
       supported for depth 8, and TrueColor visuals are supported for the
       other depths.

       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.
              Default: 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-
              Minus).  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_conservative 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 options 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,
              because the driver does not have to poll the ViRGE before
              sending it commands to make sure it is ready. It should work on
              most recent 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 4.7.0                siliconmotion(4)


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