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RADEON(4x)                                                          RADEON(4x)

       radeon - ATI RADEON video driver

       Section "Device"
         Identifier "devname"
         Driver "radeon"

       radeon is an Xorg driver for ATI RADEON-based video cards with the
       following features:

       o Full support for 8-, 15-, 16- and 24-bit pixel depths;
       o RandR 1.2 and RandR 1.3 support;
       o TV-out support (only on RV/RS1xx, RV/RS2xx, R/RV/RS3xx. Experimental
         support on R/RV5xx, R/RV6xx, and R/RV7xx through the ATOMTvOut
         option);  TV-out is not supported on cards that use the Rage Theatre
         chip for TV-out (R100, R200).
       o Full EXA 2D acceleration;
       o Full XAA 2D acceleration (only on R/RV/RS1xx, R/RV/RS2xx, R/RV/RS3xx,
         R/RV/RS4xx, R/RV5xx, RS6xx. XAA Render acceleration supported only on
         R/RV100, R/RV/RS2xx and RS3xx);
       o Textured XVideo acceleration including anti-tearing support (Bicubic
         filtering only available on R/RV3xx, R/RV/RS4xx, R/RV5xx, and
       o Overlay XVideo acceleration (only on R/RV/RS1xx, R/RV/RS2xx,
         R/RV/RS3xx, R/RV/RS4xx);
       o 3D acceleration;

       The radeon driver supports PCI, AGP, and PCIE video cards based on the
       following ATI chips (note: list is non-exhaustive):

       R100        Radeon 7200
       RV100       Radeon 7000(VE), M6, RN50/ES1000
       RS100       Radeon IGP320(M)
       RV200       Radeon 7500, M7, FireGL 7800
       RS200       Radeon IGP330(M)/IGP340(M)
       RS250       Radeon Mobility 7000 IGP
       R200        Radeon 8500, 9100, FireGL 8800/8700
       RV250       Radeon 9000PRO/9000, M9
       RV280       Radeon 9200PRO/9200/9200SE/9250, M9+
       RS300       Radeon 9100 IGP
       RS350       Radeon 9200 IGP
       RS400/RS480 Radeon XPRESS 200(M)/1100 IGP
       R300        Radeon 9700PRO/9700/9500PRO/9500/9600TX, FireGL X1/Z1
       R350        Radeon 9800PRO/9800SE/9800, FireGL X2
       R360        Radeon 9800XT
       RV350       Radeon 9600PRO/9600SE/9600/9550, M10/M11, FireGL T2
       RV360       Radeon 9600XT
       RV370       Radeon X300, M22
       RV380       Radeon X600, M24
       RV410       Radeon X700, M26 PCIE
       R420        Radeon X800 AGP
       R423/R430   Radeon X800, M28 PCIE
       R480/R481   Radeon X850 PCIE/AGP
                   Radeon X1300/X1400/X1500/X1550/X2300
       R520        Radeon X1800
       RV530/RV560 Radeon X1600/X1650/X1700
       RV570/R580  Radeon X1900/X1950
                   Radeon X1200/X1250/X2100
       R600        Radeon HD 2900
       RV610/RV630 Radeon HD 2400/2600/2700/4200/4225/4250
       RV620/RV635 Radeon HD 3410/3430/3450/3470/3650/3670
       RV670       Radeon HD 3690/3850/3870
       RS780/RS880 Radeon HD 3100/3200/3300/4100/4200/4250/4290
       RV710/RV730 Radeon HD
                   Radeon HD 4770/4730/4830/4850/4860/4870/4890
       CEDAR       Radeon HD 5430/5450/6330/6350/6370
       REDWOOD     Radeon HD 5550/5570/5650/5670/5730/5750/5770/6530/6550/6570
       JUNIPER     Radeon HD 5750/5770/5830/5850/5870/6750/6770/6830/6850/6870
       CYPRESS     Radeon HD 5830/5850/5870
       HEMLOCK     Radeon HD 5970
       PALM        Radeon HD 6310/6250
       SUMO/SUMO2  Radeon HD 6370/6380/6410/6480/6520/6530/6550/6620
       BARTS       Radeon HD 6790/6850/6870/6950/6970/6990
       TURKS       Radeon HD 6570/6630/6650/6670/6730/6750/6770
       CAICOS      Radeon HD 6430/6450/6470/6490
       CAYMAN      Radeon HD 6950/6970/6990

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

       The driver auto-detects all device information necessary to initialize
       the card.  However, if you have problems with auto-detection, you can
       specify for UMS (Userspace Modesetting):

           VideoRam - in kilobytes
           MemBase  - physical address of the linear framebuffer
           IOBase   - physical address of the MMIO registers
           ChipID   - PCI DEVICE ID

       In addition, the following driver Options are supported for both UMS
       (Userspace Modesetting) and KMS (Kernel Modesetting):

       Option "SWcursor" "boolean"
              Selects software cursor.  The default is off.

       Option "NoAccel" "boolean"
              Enables or disables all hardware acceleration.
              The default is to enable hardware acceleration.

       Option "ZaphodHeads" "string"
              Specify the RandR output(s) to use with zaphod mode for a
              particular driver instance.  If you use this option you must use
              this option for all instances of the driver.
              For example: Option "ZaphodHeads" "LVDS,VGA-0" will assign
              xrandr outputs LVDS and VGA-0 to this instance of the driver.

       Option "EXAVSync" "boolean"
              This option attempts to avoid tearing by stalling the engine
              until the display controller has passed the destination region.
              It reduces tearing at the cost of performance and has been known
              to cause instability on some chips.  The default is off.

       The following driver Options are supported for KMS (Kernel

       Option "ColorTiling" "boolean"
              The framebuffer can be addressed either in linear or tiled mode.
              Tiled mode can provide significant performance benefits with 3D
              applications.  Tiling will be disabled if the drm module is too
              old or if the current display configuration does not support it.
              On R600+ this enables 1D tiling mode.
              The default value is on for R/RV3XX, R/RV4XX, R/RV5XX, RS6XX,
              RS740, R/RV6XX, R/RV7XX, RS780, RS880, EVERGREEN, and CAYMAN and
              off for R/RV/RS1XX, R/RV/RS2XX, and RS3XX.

       Option "ColorTiling2D" "boolean"
              The framebuffer can be addressed either in linear, 1D, or 2D
              tiled modes. 2D tiled mode can provide significant performance
              benefits over 1D tiling with 3D applications.  Tiling will be
              disabled if the drm module is too old or if the current display
              configuration does not support it. KMS ColorTiling2D is only
              supported on R600 and newer chips.
              The default value is off for R/RV6XX, R/RV7XX, RS780, RS880,
              EVERGREEN, and CAYMAN.

       Option "EXAPixmaps" "boolean"
              Under KMS, to avoid thrashing pixmaps in/out of VRAM on low
              memory cards, we use a heuristic based on VRAM amount to
              determine whether to allow EXA to use VRAM for non-essential
              pixmaps.  This option allows us to override the heuristic.  The
              default is on with > 32MB VRAM, off with < 32MB.

       Option "SwapbuffersWait" "boolean"
              This option controls the behavior of glXSwapBuffers and
              glXCopySubBufferMESA calls by GL applications.  If enabled, the
              calls will avoid tearing by making sure the display scanline is
              outside of the area to be copied before the copy occurs.  If
              disabled, no scanline synchronization is performed, meaning
              tearing will likely occur.  Note that when enabled, this option
              can adversely affect the framerate of applications that render
              frames at less than refresh rate.

              The default value is on.

       Option "EnablePageFlip" "boolean"
              Enable DRI2 page flipping.  The default is on.  Pageflipping is
              supported on all radeon hardware.

       The following driver Options are supported for UMS (Userspace

       Option "Dac6Bit" "boolean"
              Enables or disables the use of 6 bits per color component when
              in 8 bpp mode (emulates VGA mode).  By default, all 8 bits per
              color component are used.
              The default is off.

       Option "VideoKey" "integer"
              This overrides the default pixel value for the YUV video overlay
              The default value is 0x1E.

       Option "ScalerWidth" "integer"
              This sets the overlay scaler buffer width. Accepted values range
              from 1024 to 2048, divisible by 64.  Values other than 1536 and
              1920 may not make sense.  This should be set automatically, but
              no one knows what the limit is for which chip. If you think
              quality is not optimal when playing back HD video (with
              horizontal resolution larger than this setting), increase this
              value.  If you get an empty area at the right (usually pink),
              decrease it. Note that this only affects the "true" overlay via
              Xv, and won't affect things like textured video.
              The default value is either 1536 (for most chips) or 1920.

       Option "AGPMode" "integer"
              Set AGP data transfer rate.  (used only when DRI is enabled)
              1      -- 1x (before AGP v3 only)
              2      -- 2x (before AGP v3 only)
              4      -- 4x
              8      -- 8x (AGP v3 only)
              others -- invalid
              The default is to leave it unchanged.

       Option "AGPFastWrite" "boolean"
              Enable AGP fast writes.  Enabling this is frequently the cause
              of instability. Used only when the DRI is enabled. If you enable
              this option you will get *NO* support from developers.
              The default is off.

       Option "BusType" "string"
              Used to replace previous ForcePCIMode option.  Should only be
              used when driver's bus detection is incorrect or you want to
              force an AGP card to PCI mode. You should NEVER force a PCI card
              to AGP bus.
              PCI    -- PCI bus
              AGP    -- AGP bus
              PCIE   -- PCI Express bus
              (used only when DRI is enabled)
              The default is auto detect.

       Option "DisplayPriority" "string"
              Used to prevent flickering or tearing problem caused by display
              buffer underflow.
              AUTO   -- Driver calculated (default).
              BIOS   -- Remain unchanged from BIOS setting.
                        Use this if the calculation is not correct
                        for your card.
              HIGH   -- Force to the highest priority.
                        Use this if you have problem with above options.
                        This may affect performance slightly.
              The default value is AUTO.

       Option "ColorTiling" "boolean"
              The framebuffer can be addressed either in linear or tiled mode.
              Tiled mode can provide significant performance benefits with 3D
              applications.  For 2D it shouldn't matter much. Tiling will be
              disabled if the virtual x resolution exceeds 2048 (3968 for R300
              and above), or if DRI is enabled and the drm module is too old.
              If this option is enabled, a new DRI driver is required for
              direct rendering.
              Color tiling will be automatically disabled in interlaced or
              doublescan screen modes.
              The default value is on.

       Option "IgnoreEDID" "boolean"
              Do not use EDID data for mode validation.  DDC is still used for
              monitor detection. This is different from NoDDC option.
              The default value is off.

       Option "CustomEDID" "string"
              Forces the X driver to use the EDID data specified in a file
              rather than the display's EDID. Also overrides DDC monitor
              You may specify a semicolon-separated list of output name and
              filename pairs with an optional flag, "digital" or "analog", to
              override the digital bit in the EDID which is used by the driver
              to determine whether to use the analog or digital encoder
              associated with a DVI-I port.  The output name is the RandR
              output name, e.g., "VGA-0" or "DVI-0"; consult the Xorg log for
              the supported output names of any given system.
              The file must contain a raw 128-byte EDID block, as captured by
              For example: Option "CustomEDID" "VGA-0:/tmp/edid1.bin;
              DVI-0:/tmp/edid2.bin:digital" will assign the EDID from the file
              /tmp/edid1.bin to the output device VGA-0, and the EDID from the
              file /tmp/edid2.bin to the output device DVI-0 and force the DVI
              port to use the digital encoder.
              Note that an output name must always be specified, even if only
              one EDID is specified.
              Caution: Specifying an EDID that doesn't exactly match your
              display may damage your hardware, as it allows the driver to
              specify timings beyond the capabilities of your display. Use
              with care.

       Option "PanelSize" "string"
              Should only be used when driver cannot detect the correct panel
              size.  Apply to both desktop (TMDS) and laptop (LVDS) digital
              panels.  When a valid panel size is specified, the timings
              collected from DDC and BIOS will not be used. If you have a
              panel with timings different from that of a standard VESA mode,
              you have to provide this information through the Modeline.
              For example, Option "PanelSize" "1400x1050"
              The default value is none.

       Option "EnablePageFlip" "boolean"
              Enable page flipping for 3D acceleration. This will increase
              performance but not work correctly in some rare cases, hence the
              default is off.  It is currently only supported on R/RV/RS4xx
              and older hardware.

       Option "ForceMinDotClock" "frequency"
              Override minimum dot clock. Some Radeon BIOSes report a minimum
              dot clock unsuitable (too high) for use with television sets
              even when they actually can produce lower dot clocks. If this is
              the case you can override the value here.  Note that using this
              option may damage your hardware.  You have been warned. The
              frequency parameter may be specified as a float value with
              standard suffixes like "k", "kHz", "M", "MHz".

       Option "RenderAccel" "boolean"
              Enables or disables hardware Render acceleration.  It is
              supported on all Radeon cards when using EXA acceleration and on
              Radeon R/RV/RS1xx, R/RV/RS2xx and RS3xx when using XAA.  The
              default is to enable Render acceleration.

       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.  The default is EXA.

       Option "AccelDFS" "boolean"
              Use or don't use accelerated EXA DownloadFromScreen hook when
              possible (only when Direct Rendering is enabled, e.g.).
              Default: off with AGP due to issues with GPU->host transfers
              with some AGP bridges, on otherwise.

       Option "FBTexPercent" "integer"
              Amount of video RAM to reserve for OpenGL textures, in percent.
              With EXA, the remainder of video RAM is reserved for EXA
              offscreen management. Specifying 0 results in all offscreen
              video RAM being reserved for EXA and only GART memory being
              available for OpenGL textures. This may improve EXA performance,
              but beware that it may cause problems with OpenGL drivers from
              Mesa versions older than 6.4. With XAA, specifying lower
              percentage than what gets reserved without this option has no
              effect, but the driver tries to increase the video RAM reserved
              for textures to the amount specified roughly.  Default: 50.

       Option "DepthBits" "integer"
              Precision in bits per pixel of the shared depth buffer used for
              3D acceleration.  Valid values are 16 and 24. When this is 24,
              there will also be a hardware accelerated stencil buffer, but
              the combined depth/stencil buffer will take up twice as much
              video RAM as when it's 16.  Default: The same as the screen

       Option "DMAForXv" "boolean"
              Try or don't try to use DMA for Xv image transfers. This will
              reduce CPU usage when playing big videos like DVDs, but may
              cause instabilities.  Default: on.

       Option "SubPixelOrder" "string"
              Force subpixel order to specified order.  Subpixel order is used
              for subpixel decimation on flat panels.
              NONE   -- No subpixel (CRT like displays)
              RGB    -- in horizontal RGB order (most flat panels)
              BGR    -- in horizontal BGR order (some flat panels)

              This option is intended to be used in following cases:
              1. The default subpixel order is incorrect for your panel.
              2. Enable subpixel decimation on analog panels.
              3. Adjust to one display type in dual-head clone mode setup.
              4. Get better performance with Render acceleration on digital
              panels (use NONE setting).
              The default is NONE for CRT, RGB for digital panels

       Option "ClockGating" "boolean"
              Enable dynamic clock gating.  This can help reduce heat and
              increase battery life by reducing power usage.  Some users
              report reduced 3D performance with this enabled.  The default is

       Option "ForceLowPowerMode" "boolean"
              Enable a static low power mode.  This can help reduce heat and
              increase battery life by reducing power usage at the expense of
              performance. The default is off.

       Option "DynamicPM" "boolean"
              Enable dynamic power mode switching.  This can help reduce heat
              and increase battery life by reducing power usage when the
              system is idle (DPMS active). The default is off.

       Option "VGAAccess" "boolean"
              Tell the driver if it can do legacy VGA IOs to the card. This is
              necessary for properly resuming consoles when in VGA text mode,
              but shouldn't be if the console is using radeonfb or some other
              graphic mode driver. Some platforms like PowerPC have issues
              with those, and they aren't necessary unless you have a real
              text mode in console. The default is off on PowerPC and SPARC
              and on on other architectures.

       Option "ReverseDDC" "boolean"
              When BIOS connector information isn't available, use this option
              to reverse the mapping of the two main DDC ports. Use this if
              the X server obviously detects the wrong display for each
              connector. This is typically needed on the Radeon 9600 cards
              bundled with Apple G5s. The default is off.

       Option "LVDSProbePLL" "boolean"
              When BIOS panel information isn't available (like on
              PowerBooks), it may still be necessary to use the firmware-
              provided PLL values for the panel or flickering will happen.
              This option will force probing of the current value programmed
              in the chip when X is launched in that case.  This is only
              useful for LVDS panels (laptop internal panels).  The default is

       Option "TVDACLoadDetect" "boolean"
              Enable load detection on the TV DAC.  The TV DAC is used to
              drive both TV-out and analog monitors. Load detection is often
              unreliable in the TV DAC so it is disabled by default.  The
              default is off.

       Option "DefaultTMDSPLL" "boolean"
              Use the default driver provided TMDS PLL values rather than the
              ones provided by the BIOS. This option has no effect on Mac
              cards.  Enable this option if you are having problems with a DVI
              monitor using the internal TMDS controller.  The default is off.

       Option "DefaultTVDACAdj" "boolean"
              Use the default driver provided TVDAC Adj values rather than the
              ones provided by the BIOS. This option has no effect on Mac
              cards.  Enable this option if you are having problems with a
              washed out display on the secondary DAC.  The default is off.

       Option "DRI" "boolean"
              Enable DRI support.  This option allows you to enable to disable
              the DRI.  The default is off for RN50/ES1000 and on for others.

       Option "DefaultConnectorTable" "boolean"
              Enable this option to skip the BIOS connector table parsing and
              use the driver defaults for each chip.  The default is off

       Option "MacModel" "string"
              Used to specify Mac models for connector tables and quirks.  If
              you have a PowerBook or Mini with DVI that does not work
              properly, try the alternate options as Apple does not seem to
              provide a good way of knowing whether they use internal or
              external TMDS for DVI.  Only valid on PowerPC.  On Linux, the
              driver will attempt to detect the MacModel automatically.
              ibook                -- ibooks
              powerbook-external   -- Powerbooks with external DVI
              powerbook-internal   -- Powerbooks with integrated DVI
              powerbook-vga        -- Powerbooks with VGA rather than DVI
              mini-external        -- Mac Mini with external DVI
              mini-internal        -- Mac Mini with integrated DVI
              imac-g5-isight       -- iMac G5 iSight
              emac                 -- eMac G4
              sam440ep             -- SAM440ep embedded board
              The default value is undefined.

       Option "TVStandard" "string"
              Used to specify the default TV standard if you want to use
              something other than the BIOS default. Valid options are:
              The default value is undefined.

       Option "ForceTVOut" "boolean"
              Enable this option to force TV-out to always be detected as
              attached.  The default is off

       Option "IgnoreLidStatus" "boolean"
              Enable this option to ignore lid status on laptops and always
              detect LVDS as attached.  The default is on.

       Option "Int10" "boolean"
              This option allows you to disable INT10 initialization.  Set
              this to False if you are experiencing a hang when initializing a
              secondary card.  The default is on.

       Option "ATOMTvOut" "boolean"
              This option enables experimental TV-out support for R/RV5xx,
              R/RV6xx, and R/RV7xx AtomBIOS chips. TV-out is experimental and
              may not function on these chips as well as hoped for.  The
              default is off.

       Option "R4xxATOM" "boolean"
              This option enables modesetting on R/RV4xx chips using AtomBIOS.
              The default is off.

       The driver supports the following X11 Xv attributes for Textured Video.
       You can use the "xvattr" tool to query/set those attributes at runtime.

              XV_VSYNC is used to control whether textured adapter
              synchronizes the screen update to the monitor vertical refresh
              to eliminate tearing.  It has two values: 'off'(0) and 'on'(1).
              The default is 'on'(1).

              XV_CRTC is used to control which display controller (crtc) the
              textured adapter synchronizes the screen update with when
              XV_VSYNC is enabled.  The default, 'auto'(-1), will sync to the
              display controller that more of the video is on; when this is
              ambiguous, the display controller associated with the RandR
              primary output is preferred.  This attribute is useful for
              things like clone mode where the user can best decide which
              display should be synced.  The default is 'auto'(-1).

              XV_BICUBIC is used to control whether textured adapter should
              apply a bicubic filter to smooth the output. It has three
              values: 'off'(0), 'on'(1) and 'auto'(2). 'off' means never apply
              the filter, 'on' means always apply the filter and 'auto' means
              apply the filter only if the X and Y sizes are scaled to more
              than double to avoid blurred output.  Bicubic filtering is not
              currently compatible with other Xv attributes like hue,
              contrast, and brightness, and must be disabled to use those
              attributes.  The default is 'off'(0).

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

        1. Wiki page:

        2. Overview about radeon development code:

        3. Mailing list:

        4. IRC channel:
           #radeon on

        5. Query the bugtracker for radeon bugs:

        6. Submit bugs & patches:

       Authors include:
       Rickard E. (Rik) Faith
       Kevin E. Martin
       Alan Hourihane 
       Marc Aurele La France
       Benjamin Herrenschmidt
       Michel Danzer  
       Alex Deucher   
       Bogdan D.      
       Eric Anholt    

X Version 11                 xf86-video-ati 6.14.6                  RADEON(4x)


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