Provided by: xserver-xorg-video-radeon_6.14.99~git20111219.aacbd629-0ubuntu2_amd64 bug


       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:

       · Full support for 8-, 15-, 16- and 24-bit pixel depths;
       · RandR 1.2 and RandR 1.3 support;
       · 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).
       · Full EXA 2D acceleration;
       · 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
       · Textured  XVideo  acceleration  including  anti-tearing  support (Bicubic filtering only
         available on R/RV3xx, R/RV/RS4xx, R/RV5xx, and RS6xx/RS740);
       · Overlay XVideo acceleration (only on R/RV/RS1xx, R/RV/RS2xx, R/RV/RS3xx, R/RV/RS4xx);
       · 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 4330/4350/4550/4650/4670/5145/5165/530v/545v/560v/565v
                   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
              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

       The following driver Options are supported for KMS (Kernel Modesetting):

       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.  KMS  ColorTiling  is  not  currently  supported  on  R/RV/RS1XX,
              R/RV/RS2XX, and RS3XX.
              The default value is on for  R/RV3XX,  R/RV4XX,  R/RV5XX,  RS6XX,  RS740,  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 Modesetting):

       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 key.
              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
              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 detection.
              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 get-edid.
              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
              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 depth.

       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
              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 off.

       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 on.

       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

       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
              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


       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 Dänzer  
       Alex Deucher   
       Bogdan D.      
       Eric Anholt