Man Linux: Main Page and Category List


       siliconmotion - Silicon Motion video driver


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


       siliconmotion  is  an Xorg 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   SM731

       MSOC        SM501,SM502


       Please  refer  to xorg.conf(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.

       Multihead mode configuration is done  through  the  RandR1.2  interface
       (see  xorg.conf(5)  and  xrandr(1)  for  further information). Hardware
       accelerated screen rotation and framebuffer resizing are only supported
       with  the  EXA  acceleration  architecture  (see the AccelMethod option

       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",
           "cougar3dr", "msoc".

       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 "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: off for SM72x and SM5xx, otherwise on.

       Option "Dualhead" "boolean"
              Enable dualhead mode.  Currently not all chips are supported and
              hardware video overlay (XV) support may have  some  limitations.
              Default: off.

       Option "PanelSize" "widthxheight"
              Override LCD panel dimension autodetection.

       Option "UseFBDev" "boolean"
              Don't actually program the hardware mode registers, but leave it
              as set by the operating system. Only available  on  MSOC  chips.
              Default: off.

       Option "CSCVideo" "boolean"
              CSC  video  uses color space conversion to render video directly
              to the framebuffer, without using an overlay.  Only available on
              MSOC chips. Default: on.

       The following video memory Options are supported:

       Option "mclk" "integer"
              Sets  the memory clock. You must specify the units.  For example
              50Mhz is the same as 50000Khz or 50000000Hz.  On MSOC chips this
              is  the main clock source for all functional blocks, such as the
              2D engine, GPIO, Video Engine, and DMA Engine.  This  option  is
              only  used for debugging purposes on MSOC chips.  Default: probe
              the memory clock value, and use it at server start.

       Option "mxclk" "integer"
              Sets the memory clock. You must specify the units.  For  example
              50Mhz  is  the same as 50000Khz or 50000000Hz.  Clock source for
              the local SDRAM controller. This option  is  only  available  on
              MSOC chips and used only for debugging purposes.  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 "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 is XAA.

       The following PCI bus Options are supported:

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

       Option "PciRetry" "boolean"
              will  allow  the  driver  to  rely  on  PCI Retry to program the
              registers.  PciBurst 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 card before sending
              it  commands  to  make  sure it is ready. It should work on most
              recent PCI chipsets.  Default: value of PciBurst option.


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


       For assistance with this driver, or Xorg in general, check the web site
       at   If  you  find  a  problem  with Xorg 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.