XGI(4)                      Kernel Interfaces Manual                      XGI(4)

       xgi - XGI video driver

       Section "Device"
         Identifier "devname"
         Driver "xgi"

       xgi is an XFree86 driver for XGI  video chips. The driver is accelerated,
       and provides support for colordepths of 8, 16 and 24 bpp.  XVideo, Render
       and other extensions are supported as well.

       The xgi driver supports PCI and AGP video cards based on the following

       XGI5597/5598 XGI530/620 XGI6326/AGP/DVD XGI300/305 XGI540 XGI630/730
       XGI315/H/PRO XGI550/551/552 XGI650/651/M650/661FX/M661FX/M661MX/740/741
       XGI330 (Xabre) XGI760

       In the following text, the following terms are used:

       old series for XGI5597/5598, 530/620 and 6326/AGP/DVD

       300 series for XGI300/305, 540 and 630/730

       315/330 series for XGI315/H/PRO, 55x and (M)65x/(M)661xX/74x, 330, 760

       Note: Support for 661FX, M661FX, M661MX, 741 and 760 is untested.

       Please refer to XF86Config(5) for general configuration details.  This
       section only covers configuration details specific to this driver.

       Detailed information on all supported options can be obtained at

       This manpage only covers a subset of the supported options.

       1. For all supported chipsets

       The following driver Options are supported on all chipsets:

       Option "NoAccel" "boolean"
              Disable or enable 2D acceleration. Default: acceleration is

       Option "HWCursor" "boolean"
              Enable or disable the HW cursor. Default: HWCursor is on.

       Option "SWCursor" "boolean"
              The opposite of HWCursor. Default: SWCursor is off.

       Option "Rotate" "CW"
              Rotate the display clockwise. This mode is unaccelerated, and uses
              the Shadow Frame Buffer layer. Using this option disables the
              Resize and Rotate extension (RandR).  Default: no rotation.

       Option "Rotate" "CCW"
              Rotate the display counterclockwise. This mode is unaccelerated,
              and uses the Shadow Frame Buffer layer. Using this option disables
              the Resize and Rotate extension (RandR).  Default: no rotation.

       Option "ShadowFB" "boolean"
              Enable or disable use of the shadow framebuffer layer.  Default:
              Shadow framebuffer is off.

       Option "CRT1Gamma" "boolean"
              Enable or disable gamma correction.  Default: Gamma correction is

       2. Old series specific information

       The driver will auto-detect the amount of video memory present for all
       these chips, but in the case of the 6326, it will limit the memory size
       to 4MB. This is because the 6326's 2D engine can only address 4MB. The
       remaining memory seems to be intended for 3D texture data, since only the
       3D engine can address RAM above 4MB. However, you can override this
       limitation using the "VideoRAM" option in the Device section if your
       board has more than 4MB and you need to use it. However, 2D acceleration,
       Xvideo and the HWCursor will be disabled in this case.

       The driver will also auto-detect the maximum dotclock and DAC speed.  If
       you have problems getting high resolutions because of dot clock
       limitations, try using the "DacSpeed" option, also in the Device section.
       However, this is not recommended for the 6326. For this chip, the driver
       has two built-in modes for high resolutions which you should use instead.
       These are named "XGI1280x1024-75" and "XGI1600x1200-60" and they will be
       added to the list of default modes. To use these modes, just place them
       in your Screen section. Example:

       Modes "XGI1600x1200-60" "XGI1280x1024x75" "1024x768" ...

       Of these modes, 1280x1024 is only available at 8, 15 and 16bpp. 1600x1200
       is available at 8bpp only.

       TV support for the 6326

       TV output is supported for the 6326. The driver will auto detect a TV
       connected and in this case add the following modes to the list of default
       modes: "PAL800x600", "PAL800x600U", "PAL720x540", "PAL640x480",
       "NTSC640x480", "NTSC640x480U" and "NTSC640x400".  Use these modes like
       the hi-res modes described above.

       The following driver Options are supported on the old series:

       Option "TurboQueue" "boolean"
              Enable or disable TurboQueue mode.  Default: off for 530/620, on
              for the others

       Option "FastVram" "boolean"
              Enable or disable FastVram mode.  Enabling this sets the video RAM
              timing to one cycle per read operation instead of two cycles.
              Disabling this will set two cycles for read and write operations.
              Leaving this option out uses the default, which varies depending
              on the chipset.

       Option "NoHostBus" "boolean"
              (XGI5597/5598 only). Disable CPU-to-VGA host bus support. This
              speeds up CPU to video RAM transfers. Default: Host bus is

       Option "NoXVideo" "boolean"
              Disable XV (XVideo) extension support. Default: XVideo is on.

       Option "NoYV12" "boolean"
              Disable YV12 Xv support. This might me required due to hardware
              bugs in some chipsets. Disabling YV12 support forces Xv-aware
              applications to use YUV2 or XShm for video output.  Default: YV12
              support is on.

       Option "TVStandard" "string"
              (6326 only) Valid parameters are PAL or NTSC.  The default is set
              by a jumper on the card.

       Option "TVXPosOffset" "integer"
              (6326 only) This option allows tuning the horizontal position of
              the image for TV output. The range is from -16 to 16. Default: 0

       Option "TVYPosOffset" "integer"
              (6326 only) This option allows tuning the vertical position of the
              image for TV output. The range is from -16 to 16. Default: 0

       Option "XGI6326TVEnableYFilter" "boolean"
              (6326 only) This option allows enabling/disabling the Y (chroma)
              filter for TV output.

       Option "XGI6326TVAntiFlicker" "string"
              (6326 only) This option allow enabling/disabling the anti flicker
              facility for TV output. Possible parameters are OFF, LOW, MED,
              HIGH or ADAPTIVE.  By experience, ADAPTIVE yields the best
              results, hence it is the default.

       2. 300 and 315/330 series specific information

       The 300 and 315/330 series feature two CRT controllers and very often
       come with a video bridge for controlling LCD and TV output. Hereinafter,
       the term CRT1 refers to the VGA output of the chip, and CRT2 refers to
       either LCD, TV or secondary VGA. Due to timing reasons, only one CRT2
       output can be active at the same time. But this limitation does not apply
       to using CRT1 and CRT2 at the same time which makes it possible to run
       the driver in dual head mode.

       The driver supports the following video bridges:

       XGI301 XGI301B(-DH) XGI301C XGI301LV(X) XGI302LV

       Instead of a video bridge, some machines have a LVDS transmitter to
       control LCD panels, and a Chrontel 7005 or 7019 for TV output. All these
       are supported as well.

       About TV output

       On the XGI301 and the Chrontel 7005, only resolutions up to 800x600 are
       supported. On all others, resolutions up to 1024x768 are supported.
       However, due to a hardware bug, Xvideo might be distorted on XGI video
       bridges if running NTSC or PAL-M at 1024x768.

       About XVideo support

       XVideo is supported on all chipsets of both families. However, there are
       some differences in hardware features which cause limitations.  The 300
       series as well as the XGI55x, M650, 651, 661FX, M661FX, and 741 support
       two video overlays. The XGI315/H/PRO, 650/740 and 330 support only one
       such overlay. On chips with two overlays, one overlay is used for CRT1,
       the other for CRT2. On the other chipsets, the option "XvOnCRT2" can be
       used to select the desired output channel.

       About Merged Framebuffer support

       This mode is strongly recommended over Xinerama. Please see
       http://www.winischhofer.net/linuxxgivga.shtml for detailed information.

       About dual-head support

       Dual head mode has some limitations as regards color depth and
       resolution. Due to memory bandwidth limits, CRT1 might have a reduced
       maximum refresh rate if running on higher resolutions than 1280x1024.

       Colordepth 8 is not supported when running in dual head mode.

       The following driver Options are supported on the 300 and 315/330 series:

       Option "NoXVideo" "boolean"
              Disable XV (XVideo) extension support.  Default: XVideo is on.

       Option "XvOnCRT2" "boolean"
              On chipsets with only one video overlay, this option can used to
              bind the overlay to CRT1 ( if a monitor is detected and if this
              option is either unset or set to false ) or CRT2 ( if a CRT2
              device is detected or forced, and if this option is set to true ).
              If either only CRT1 or CRT2 is detected, the driver decides
              automatically. In Merged Framebuffer mode, this option is ignored.
              Default: overlay is used on CRT1

       Option "ForceCRT1" "boolean"
              Force CRT1 to be on of off. If a monitor is connected, it will be
              detected during server start. However, some old monitors are not
              detected correctly. In such cases, you may set this option to on
              in order to make the driver initialize CRT1 anyway.  If this
              option is set to off , the driver will switch off CRT1.  Default:

       Option "ForceCRT2Type" "string"
              Force display type to one of: NONE , TV , SVIDEO , COMPOSITE ,
              SVIDEO+COMPOSITE , SCART , LCD , VGA ; NONE will disable CRT2. The
              SVIDEO, COMPOSITE, SVIDEO+COMPOSITE and SCART parameters are for
              XGI video bridges only and can be used to force the driver to use
              a specific TV output connector (if present).  Default: auto

       Option "CRT2Gamma" "boolean"
              Enable or disable gamma correction for CRT2. Only supported for
              XGI video bridges. Default: Gamma correction for CRT2 is on.

       Option "TVStandard" "string"
              Force the TV standard to either PAL or NTSC.  On some machines
              with 630, 730 and the 315/330 series, PALM , PALN and NTSCJ are
              supported as well. Default: BIOS setting.

       Option "TVXPosOffset" "integer"
              This option allows tuning the horizontal position of the image for
              TV output. The range is from -32 to 32. Not supported on the
              Chrontel 7019. Default: 0

       Option "TVYPosOffset" "integer"
              This option allows tuning the vertical position of the image for
              TV output. The range is from -32 to 32. Not supported on the
              Chrontel 7019. Default: 0

       Option "XGITVXScale" "integer"
              This option selects the horizontal zooming level for TV output.
              The range is from -16 to 16. Only supported on XGI video bridges.
              Default: 0

       Option "XGITVYScale" "integer"
              This option selects the vertical zooming level for TV output in
              the following modes: 640x480, 800x600. On the 315/330 series, also
              720x480, 720x576 and 768x576. The range is from -4 to 3. Only
              supported on XGI video bridges. Default: 0

       Option "CHTVOverscan" "boolean"
              On machines with a Chrontel TV encoder, this can be used to force
              the TV mode to overscan or underscan.  on means overscan, off
              means underscan.  Default: BIOS setting.

       Option "CHTVSuperOverscan" "boolean"
              On machines with a Chrontel 7005 TV encoder, this option enables a
              super-overscan mode. This is only supported if the TV standard is
              PAL. Super overscan will produce an image on the TV which is
              larger than the viewable area.

       The driver supports many more options. Please see
       http://www.winischhofer.net/linuxxgivga.shtml for more information.

       3. 300 series specific information

       DRI is supported on the 300 series only. On Linux, DRI requires the
       kernel's XGI framebuffer driver ( xgifb ) and some other modules which
       come with either the kernel or XFree86.

       Xgifb takes care of memory management for texture data. In order to
       prevent the X Server and xgifb from overwriting each other's data, xgifb
       reserves an amount of video memory for the X driver. This amount can
       either be selected using xgifb's mem parameter, or auto-selected
       depending on the amount of total video RAM available.

       Xgifb can be used for memory management only, or as a complete
       framebuffer driver. If you start xgifb with a valid mode (ie you gain a
       graphical console), the X driver can communicate with xgifb and doesn't
       require any manual configuration for finding out about the video memory
       it is allowed to use.  However, if you are running a 2.4 series Linux
       kernel and use xgifb for video memory management only, ie you started
       xgifb with mode=none and still have a text mode console, there is no
       communication between xgifb and the X driver. For this purpose, the

       Option "MaxXFBMem" "integer"

       exists. This option must be set to the same value as given to xgifb
       through its "mem" parameter, ie the amount of memory to use for X in

       If you started xgifb without the mem argument, xgifb will reserve

       12288KB if more than 16MB of total video RAM is available,

       8192KB if between 12 and 16MB of video RAM is available,

       4096KB in all other cases.

       If you intend to use DRI, I recommend setting the total video memory in
       the BIOS to 64MB in order to at least overcome the lack of memory swap

       Option "DRI" "boolean"
              This option allows enabling or disabling DRI. By default, DRI is

       Option "AGPSize" "integer"
              This option allows selecting the amount of AGP memory to be used
              for DRI.  The amount is to be specified in megabyte, the default
              is 8.


       XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

       http://www.winischhofer.net/linuxxgivga.shtml for more information and

       Authors include: Alan Hourihane, Mike Chapman, Juanjo Santamarta, Mitani
       Hiroshi, David Thomas, Sung-Ching Lin, Ademar Reis, Thomas Winischhofer

X Version 11                  xf86-video-xgi 1.6.1                        XGI(4)