Table of Contents


via - VIA video driver


Section "Device"
  Identifier "devname"
  Driver "via"


via is an Xorg driver for VIA video chipsets.

The via driver supports the VIA CLE266 (CLE3122, CLE3022) chipset video and the VIA KM400/K8M800 VT3204/5/7204/5 video, including 2D acceleration and the Xv video overlay extensions. Flat panel, TV and VGA outputs are supported.

Direct rendering 3D is available for this device only using Xorg 4.2 builds. If you are interested in porting the DRI support to current Xorg then please see the DRI project on

Configuration Details

Please refer to xorg.conf(5x) for general configuration details. This section only covers configuration details specific to this driver.

The following driver options are supported

Option "NoAccel" "boolean"
Disable or enable acceleration. Default: acceleration is enabled.
Option "HWCursor" "boolean"
Disable or enable use of hardware cursors. The default is enabled.
Option "SWCursor" "boolean"
Disable or enable the use of a software cursor. The default is disabled.
Option "ShadowFB" "boolean"
Use a shadow frame buffer. This is required when rotating the display, but otherwise defaults to disabled.
Option "UseBIOS" "boolean"
Use the video BIOS to set modes. Default false.
Option "VideoRAM" "boolean"
Override the VideoRAM auto detection. This should never be needed.
Option "Rotate" "string"
Rotate the display either clockwise ("CW") or counter clockwise ("CCW"). Rotation is only supported unaccelerated.
Option "ActiveDevice" "string"
Specify the active device combination. The choices are "CRT,TV", "CRT,LCD", "CRT,DFP", "TV,DFP", "CRT", "LCD", or "DFP", for the various supported combinations of VGA CRT output, LCD panel output, DFP output and TV output.
Option "LCDDualEdge" "boolean"
Use dual edge mode to set the LCD.
Option "Center" "boolean"
Disable or enable image centering on DVI displays.
Option "PanelSize" "string"
Specify the size (width x height) of the LCD panel attached to the system. Sizes 640x480, 800x600, 1024x768, 1280x1024, and 1400x1050 are supported.
Option "TVDotCrawl" "boolean"
Disable or enable dotcrawl.
Option "TVType" "string"
Specify TV output format. The driver currently supports NTSC and PAL timings only.
Option "TVOutput" "string"
Specify which TV output to use. The driver supports "S-Video", "Composite", "SC", "RGB" and "YCbCr" outputs. Note that on many boards the composite video port is shared with audio out and jumper selected.
Option "TVVScan" "string"
Specify whether to underscan the TV image (bordering it with black), or overscan it (losing the edges of the picture).
Option "TVHScale" "string"
Not yet implemented.
Option "TVEncoder" "string"
Specify which TV encoder chip is attached to the system. The driver currently supports the VT1621 and VT1622 encoders.
Option "Refresh" "integer"
Specify the desired refresh.
Option "DisableVQ" "boolean"
Disable or enable the use of VQ. VQ is enabled by default.
Option "Cap0Deinterlace" "string"
Set the capture 0 port interlace mode to either Bob or Weave.
Option "Cap1Deinterlace" "string"
Set the capture 1 port interlace mode to either Bob or Weave.
Option "Cap0FieldSwap" "string"
Perform field swapping on capture port 0.
Option "DRIXINERAMA" "boolean"
Set DRI Xinerama mode. Currently unsupported.
Option "NoDDCValue" "boolean"
Disable the use of DDC to set the horizontal sync and vertical refresh.

See Also

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


Authors include: ...

Table of Contents