siliconmotion(4) Kernel Interfaces Manual siliconmotion(4)
siliconmotion - Silicon Motion video driver
[ 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:
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 rota-
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.
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.
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
The following acceleration and graphics engine Options are supported:
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.
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
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 send-
ing 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 http://www.x.org/. If you find a problem with Xorg or have a ques-
tion not answered in the FAQ please use our bug report form available
on the web site or send mail to xorgATlists.org. When
reporting problems with the driver send as much detail as possible,
including chipset type, a server output log, and operating system
Kevin Brosius, Matt Grossman, Harald Koenig, Sebastien Marineau, Mark
Vojkovich, Frido Garritsen, Corvin Zahn.
X Version 11 xf86-video-siliconmotion 1.6.0 siliconmotion(4)