radeon - ATI RADEON video driver
Section "Device"
  Identifier "devname"
  Driver "radeon"
  ...
EndSection
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 RS3xx);
- •
- 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
- RV505/RV515/RV516/RV550
- Radeon X1300/X1400/X1500/X1550/X2300
- R520
- Radeon X1800
- RV530/RV560
- Radeon X1600/X1650/X1700
- RV570/R580
- Radeon X1900/X1950
- RS600/RS690/RS740
- 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
- RV740/RV770/RV790
- 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
- ARUBA
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 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. 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 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 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 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
      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 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 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 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 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:
 ntsc
 pal
 pal-m
 pal-60
 ntsc-j
 scart-pal
 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
- 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
- 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
- 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:
http://www.x.org/wiki/radeon
  -  2.
- Overview about radeon development code:
http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/
  -  3.
- Mailing list:
http://lists.x.org/mailman/listinfo/xorg-driver-ati
  -  4.
- IRC channel:
#radeon on irc.freenode.net
  -  5.
- Query the bugtracker for radeon bugs:
https://bugs.freedesktop.org/query.cgi?product=xorg&component=Driver/Radeon
  -  6.
- Submit bugs & patches:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver/Radeon
Authors include:
Rickard E. (Rik) Faith   faith@precisioninsight.com
Kevin E. Martin          kem@freedesktop.org
Alan Hourihane           alanh@fairlite.demon.co.uk
Marc Aurele La France    tsi@xfree86.org
Benjamin Herrenschmidt   benh@kernel.crashing.org
Michel Dänzer            michel@daenzer.net
Alex Deucher             alexdeucher@gmail.com
Bogdan D.                bogdand@users.sourceforge.net
Eric Anholt              eric@anholt.net