NVIDIA HELP
      Option "NvAGP" "integer"
                Configure AGP support. Integer argument can be one of:
                0 : disable agp
                1 : use NVIDIA's internal AGP support, if possible
                2 : use AGPGART, if possible
                3 : use any agp support (try AGPGART, then NVIDIA's AGP)
                Please note that NVIDIA's internal AGP support cannot
                work if AGPGART is either statically compiled into your
                kernel or is built as a module, but loaded into your
                kernel (some distributions load AGPGART into the kernel
                at boot up).  Default: 3 (the default was 1 until after
                1.0-1251).

        Option "NoLogo" "boolean"
                Disable drawing of the NVIDIA logo splash screen at
                X startup.  Default: the logo is drawn.

        Option "RenderAccel" "boolean"
                Enable or disable hardware acceleration of the RENDER
                extension.  THIS OPTION IS EXPERIMENTAL.  ENABLE IT AT YOUR
                OWN RISK.  There is no correctness test suite for the
                RENDER extension so NVIDIA can not verify that RENDER
                acceleration works correctly.   Default: hardware
                acceleration of the RENDER extension is disabled.

        Option "NoRenderExtension" "boolean"
                Disable the RENDER extension.  Other than recompiling
                the X-server, XFree86 does not seem to have another way of
                disabling this.  Fortunatly, we can control this from the
                driver so we export this option.  This is useful in depth
                8 where RENDER would normally steal most of the default
                colormap. Default: RENDER is offered when possible.

        Option "UBB" "boolean"
                Enable or disable Unified Back Buffer on any Quadro
                based GPUs (Quadro4 NVS excluded); please see
                Appendix M for a description of UBB.  This option has
                no affect on non-Quadro chipsets.  Default: UBB is on
                for Quadro chipsets.

        Option "NoFlip" "boolean"
                Disable OpenGL flipping; please see Appendix M for
                a description.  Default: OpenGL will swap by flipping
                when possible.

        Option "DigitalVibrance" "integer"
                Enables Digital Vibrance Control.  The range of valid
                values are 0 through 255.  This feature is not available
                on products older than GeForce2.  Default: 0.

        Option "Dac8Bit" "boolean"
                Most Quadro parts by default use a 10 bit color look
                up table (LUT) by default; setting this option to TRUE forces
                these graphics chips to use an 8 bit (LUT).  Default:
                a 10 bit LUT is used, when available.

        Option "Overlay" "boolean"
                Enables RGB workstation overlay visuals.  This is only
                supported on Quadro4 and Quadro FX chips (Quadro4 NVS
                excluded) in depth 24.  This option causes the server to
                advertise the SERVER_OVERLAY_VISUALS root window property
                and GLX will report single and double buffered, Z-buffered
                16 bit overlay visuals.  The transparency key is pixel
                0x0000 (hex).  There is no gamma correction support in
                the overlay plane.  This feature requires XFree86 version
                4.1.0 or newer.  NV17/18 based Quadros (ie. 500/550 XGL)
                have additional restrictions, namely, overlays are not
                supported in TwinView mode or with virtual desktops
                larger than 2046x2047 in any dimension (eg.  it will not
                work in 2048x1536 modes).  Quadro 7xx/9xx and Quadro FX
                will offer overlay visuals in these modes (TwinView, or
                virtual desktops larger than 2046x2047), but the overlay
                will be emulated with a substantial performance penalty.
                Default: off.

        Option "CIOverlay" "boolean"
                Enables Color Index workstation overlay visuals with
                identical restrictions to Option "Overlay" above.
                The server will offer visuals both with and without a
                transparency key.  These are depth 8 PseudoColor visuals.
                Enabling Color Index overlays on X servers older than
                XFree86 4.3 will force the RENDER extension to be disabled
                due to bugs in the RENDER extension in older X servers.
                Default: off.

        Option "TransparentIndex" "integer"
                When color index overlays are enabled, use this option
                to choose which pixel is used for the transparent pixel
                in visuals featuring transparent pixels.  This value
                is clamped between 0 and 255 (Note: some applications
                such as Alias/Wavefront's Maya require this to be zero
                in order to work correctly).  Default: 0.

        Option "OverlayDefaultVisual" "boolean"
                When overlays are used, this option sets the default
                visual to an overlay visual thereby putting the root
                window in the overlay.  This option is not recommended
                for RGB overlays.  Default: off.

        Option "SWCursor" "boolean"
                Enable or disable software rendering of the X cursor.
                Default: off.

        Option "HWCursor" "boolean"
                Enable or disable hardware rendering of the X cursor.
                Default: on.

        Option "CursorShadow" "boolean" Enable or disable use of a
                shadow with the hardware accelerated cursor; this is a
                black translucent replica of your cursor shape at a
                given offset from the real cursor.  This option is
                only available on GeForce2 or better hardware (ie
                everything but TNT/TNT2, GeForce 256, GeForce DDR and
                Quadro).  Default: no cursor shadow.

        Option "CursorShadowAlpha" "integer"
                The alpha value to use for the cursor shadow; only
                applicable if CursorShadow is enabled.  This value must
                be in the range [0, 255] -- 0 is completely transparent;
                255 is completely opaque.  Default: 64.

        Option "CursorShadowXOffset" "integer"
                The offset, in pixels, that the shadow image will be
                shifted to the right from the real cursor image; only
                applicable if CursorShadow is enabled.  This value must
                be in the range [0, 32].  Default: 4.

        Option "CursorShadowYOffset" "integer"
                The offset, in pixels, that the shadow image will be
                shifted down from the real cursor image; only applicable
                if CursorShadow is enabled.  This value must be in the
                range [0, 32].  Default: 2.

        Option "ConnectedMonitor" "string"
                Allows you to override what the NVIDIA kernel module
                detects is connected to your video card.  This may
                be useful, for example, if you use a KVM (keyboard,
                video, mouse) switch and you are switched away when
                X is started.  In such a situation, the NVIDIA kernel
                module cannot detect what display devices are connected,
                and the NVIDIA X driver assumes you have a single CRT.

                Valid values for this option are "CRT" (cathode ray
                tube), "DFP" (digital flat panel), or "TV" (television);
                if using TwinView, this option may be a comma-separated
                list of display devices; e.g.: "CRT, CRT" or "CRT, DFP".

                NOTE: anything attached to a 15 pin VGA connector is
                regarded by the driver as a CRT.  "DFP" should only be
                used to refer to flatpanels connected via a DVI port.

                Default: string is NULL.

        Option "UseEdidFreqs" "boolean"
                This option causes the X server to use the HorizSync
                and VertRefresh ranges given in a display device's EDID,
                if any.  EDID provided range information will override
                the HorizSync and VertRefresh ranges specified in the
                Monitor section.  If a display device does not provide an
                EDID, or the EDID does not specify an hsync or vrefresh
                range, then the X server will default to the HorizSync
                and VertRefresh ranges specified in the Monitor section.

        Option "IgnoreEDID" "boolean"
                Disable probing of EDID (Extended Display Identification
                Data) from your monitor.  Requested modes are compared
                against values gotten from your monitor EDIDs (if any)
                during mode validation.  Some monitors are known to lie
                about their own capabilities.  Ignoring the values that
                the monitor gives may help get a certain mode validated.
                On the other hand, this may be dangerous if you do not
                know what you are doing.  Default: Use EDIDs.

        Option "NoDDC" "boolean"
                Synonym for "IgnoreEDID"

        Option "FlatPanelProperties" "string"
                Requests particular properties of any connected flat
                panels as a comma-separated list of property=value pairs.
                Currently, the only two available properties are 'Scaling'
                and 'Dithering'.   The possible values for 'Scaling' are:
                'default' (the driver will use whatever scaling state
                is current), 'native' (the driver will use the flat
                panel's scaler, if it has one), 'scaled' (the driver
                will use the NVIDIA scaler, if possible), 'centered'
                (the driver will center the image, if possible),
                and 'aspect-scaled' (the driver will scale with the
                NVIDIA scaler, but keep the aspect ratio correct).
                The possible values for 'Dithering' are: 'default'
                (the driver will decide when to dither), 'enabled' (the
                driver will always dither when possible), and 'disabled'
                (the driver will never dither).  If any property is not
                specified, it's value shall be 'default'.  An example
                properties string might look like:

                "Scaling = centered, Dithering = enabled"

        Option "UseInt10Module" "boolean"
                Enable use of the XFree86 Int10 module to soft-boot all
                secondary cards, rather than POSTing the cards through
                the NVIDIA kernel module.  Default: off (POSTing is
                done through the NVIDIA kernel module).

        Option "TwinView" "boolean"
                Enable or disable TwinView. Default: TwinView is disabled.

        Option "TwinViewOrientation" "string"
                Controls the relationship between the two display devices
                when using TwinView.  Takes one of the following values:
                "RightOf" "LeftOf" "Above" "Below" "Clone". 

        Option "SecondMonitorHorizSync" "range(s)"
                This option is like the HorizSync entry in the Monitor
                section, but is for the second monitor when using
                TwinView. 

        Option "SecondMonitorVertRefresh" "range(s)"
                This option is like the VertRefresh entry in the Monitor
                section, but is for the second monitor when using
                TwinView. 

        Option "MetaModes" "string"
                This option describes the combination of modes to use
                on each monitor when using TwinView.

        Option "NoTwinViewXineramaInfo" "boolean"
                When in TwinView, the NVIDIA X driver normally provides
                a Xinerama extension that X clients (such as window
                managers) can use to to discover the current TwinView
                configuration.  Some window mangers can get confused by
                this information, so this option is provided to disable
                this behavior.  Default: TwinView Xinerama information
                is provided.

        Option "TVStandard" "string"
                "PAL-B"  : used in Belgium, Denmark, Finland, Germany, Guinea,
                   Hong Kong, India, Indonesia, Italy, Malaysia, The
                   Netherlands, Norway, Portugal, Singapore, Spain,
                   Sweden, and Switzerland
            "PAL-D"  : used in China and North Korea
            "PAL-G"  : used in Denmark, Finland, Germany, Italy, Malaysia,
                   The Netherlands, Norway, Portugal, Spain, Sweden,
                   and Switzerland
            "PAL-H"  : used in Belgium
            "PAL-I"  : used in Hong Kong and The United Kingdom
            "PAL-K1" : used in Guinea
            "PAL-M"  : used in Brazil
            "PAL-N"  : used in France, Paraguay, and Uruguay
            "PAL-NC" : used in Argentina
            "NTSC-J" : used in Japan
            "NTSC-M" : used in Canada, Chile, Colombia, Costa Rica, Ecuador,
                   Haiti, Honduras, Mexico, Panama, Puerto Rico, South
                   Korea, Taiwan, United States of America, and Venezuela

           

        Option "TVOutFormat" "string"
             The "TVOutFormat" option can be used to force SVIDEO or COMPOSITE
            output.  Without this option the driver autodetects the output format.
            Unfortunately, it does not always do this correctly.  The output format
            can be forced with the options:

        Option "TVOverScan" "Decimal value in the range 0.0 to 1.0"
                Valid values are in the range 0.0 through 1.0;

        Option "Stereo" "integer"
                Enable offering of quad-buffered stereo visuals on Quadro.
                Integer indicates the type of stereo glasses being used:
 
                1 - DDC glasses.  The sync signal is sent to the glasses
                    via the DDC signal to the monitor.  These usually
                    involve a passthrough cable between the monitor and
                    video card.

                2 - "Blueline" glasses.  These usually involve
                    a passthrough cable between the monitor and video
                    card.  The glasses know which eye to display based
                    on the length of a blue line visible at the bottom
                    of the screen.  When in this mode, the root window
                    dimensions are one pixel shorter in the Y dimension
                    than requested.  This mode does not work with virtual
                    root window sizes larger than the visible root window
                    size (desktop panning).

                3 - Onboard stereo support.  This is usually only found
                    on professional cards.  The glasses connect via a
                    DIN connector on the back of the video card.

                4 - TwinView clone mode stereo (aka "passive" stereo).
                    On video cards that support TwinView, the left eye
                    is displayed on the first display, and the right
                    eye is displayed on the second display.  This is
                    normally used in conjuction with special projectors
                    to produce 2 polarized images which are then viewed
                    with polarized glasses.  To use this stereo mode,
                    you must also configure TwinView in clone mode with
                    the same resolution, panning offset, and panning
                    domains on each display.

                Stereo is only available on Quadro cards.  Stereo
                options 1, 2, and 3 (aka "active" stereo) may be used
                with TwinView if all modes within each metamode have
                identical timing values.  Please see (app-l)  APPENDIX
                L: PROGRAMMING MODES for suggestions on making sure the
                modes within your metamodes are identical.  The identical
                modeline requirement is not necessary for Stereo option 4
                ("passive" stereo).  Currently, stereo operation may
                be "quirky" on the original Quadro (NV10) chip and
                left-right flipping may be erratic.  We are trying
                to resolve this issue for a future release.  Default:
                Stereo is not enabled.

                Stereo options 1, 2, and 3 (aka "active" stereo) are not
                supported on Digital Flatpanels.

        Option "AllowDFPStereo" "boolean"
                By default, the NVIDIA X driver performs a check which
                disables active stereo (stereo options 1, 2, and 3)
                if the X screen is driving a DFP.  The "AllowDFPStereo"
                option bypasses this check.

        Option "NoBandWidthTest" "boolean"
                As part of mode validation, the X driver tests if a
                given mode fits within the hardware's memory bandwidth
                constraints.  This option disables this test.  Default:
                the memory bandwidth test is performed.

        Option "IgnoreDisplayDevices" "string"
                This option tells the NVIDIA kernel module to completely
                ignore the indicated classes of display devices when
                checking what display devices are connected.  You may
                specify a comma-separated list containing any of "CRT",
                "DFP", and "TV".

                For example:

                    Option "IgnoreDisplayDevices" "DFP, TV"

                will cause the NVIDIA driver to not attempt to detect
                if any flatpanels or TVs are connected.

                This option is not normally necessary; however, some video
                BIOSes contain incorrect information about what display
                devices may be connected, or what i2c port should be
                used for detection.  These errors can cause long delays
                in starting X.  If you are experiencing such delays, you
                may be able to avoid this by telling the NVIDIA driver to
                ignore display devices which you know are not connected.

                NOTE: anything attached to a 15 pin VGA connector is
                regarded by the driver as a CRT.  "DFP" should only be
                used to refer to flatpanels connected via a DVI port.

        Option "MultisampleCompatibility" "boolean"
                Enable or disable the use of separate front and back
                multisample buffers.  This will consume more memory
                but is necessary for correct output when rendering to
                both the front and back buffers of a multisample or
                FSAA drawable.  This option is necessary for correct
                operation of SoftImage XSI.  Default: a singlemultisample
                buffer is shared between the front and back buffers.

        Option "NoPowerConnectorCheck" "boolean"
                The NVIDIA X driver will abort X server initialization
                if it detects that a GPU that requires an external power
                connector does not have an external power connector
                plugged in.  This option can be used to bypass this test.
                Default: the power connector test is performed.