Provided by: xserver-xorg-video-siliconmotion_1.6.0-1build2_i386 bug


       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


       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.

       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   and  disables  RandR  extension.  Default:  no

       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.

       Option "Dualhead" "boolean"
              Enable  dualhead mode.  Due to hardware limitations, dualhead is
              limited to depth 16 and to the panel size and  timings  on  both
              the  flat  panel and the CRT and the CRT must be to the right of
              the flat panel.  Only lynx chips are supported  at  the  moment.
              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.

       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 additional Options are supported:

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


       Xorg(1), xorg.conf(5), xorgconfig(1), 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.