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siliconmotion - Silicon Motion video driver
[ 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:
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.
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
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.
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 http://www.xfree86.org. A FAQ is available on the
web site at http://www.xfree86.org/FAQ/. 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
XFree86@XFree86.org. 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.
4.5.0 XFree86 siliconmotion(4)