Provided by: xserver-xorg-video-radeon-lts-wily_7.5.0+git20150819-0ubuntu1~trusty1_amd64 bug


       radeon - ATI/AMD RADEON video driver


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


       radeon is an Xorg driver for ATI/AMD 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;
       • Full EXA 2D acceleration;
       • Textured  XVideo  acceleration  including  anti-tearing  support (Bicubic filtering only
         available on R/RV3xx, R/RV/RS4xx, R/RV5xx, and RS6xx/RS740);
       • 3D acceleration;


       The radeon driver supports PCI, AGP, and PCIe video cards based on the  following  ATI/AMD
       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
       ARUBA       Radeon HD 7000 series
       TAHITI      Radeon HD 7900 series
       PITCAIRN    Radeon HD 7800 series
       VERDE       Radeon HD 7700 series
       OLAND       Radeon HD 8000 series
       HAINAN      Radeon HD 8000 series
       BONAIRE     Radeon HD 7790 series
       KAVERI      KAVERI APUs
       KABINI      KABINI APUs
       HAWAII      Radeon R9 series


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

       The following driver Options are supported:

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

       Option "Accel" "boolean"
              Enables or disables all hardware acceleration.
              The default is on.

       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 "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, CAYMAN, ARUBA, Southern Islands, and Sea Islands
              and off for R/RV/RS1XX, R/RV/RS2XX,  RS3XX,  and  RS690/RS780/RS880  when  fast  fb
              feature is enabled.

       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 and requires Mesa 9.0 or newer for R6xx-ARUBA,
              Mesa 9.2 or newer for Southern Islands, and Mesa 10.1 or newer for Sea Islands.
              The default value is on for R/RV6XX,  R/RV7XX,  RS780,  RS880,  EVERGREEN,  CAYMAN,
              ARUBA, Southern Islands, and Sea Islands.

       Option "DRI" "integer"
              Define  the  maximum  level  of DRI to enable. Valid values are 2 for DRI2 or 3 for
              DRI3.  The default is 2 for DRI2.

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

       Option "TearFree" "boolean"
              Enable  tearing  prevention using the hardware page flipping mechanism. This option
              currently doesn't have any effect for rotated CRTCs.  It  requires  allocating  two
              separate  scanout buffers for each non-rotated CRTC. Enabling this option currently
              disables Option "EnablePageFlip". The default is off.

       Option "AccelMethod" "string"
              Chooses between available acceleration architectures.  Valid values  are  EXA  (for
              pre-TAHITI  GPUs)  and  glamor  (for  R300  or higher). The default is glamor as of
              TAHITI, otherwise EXA.

       The following driver Options are supported for glamor :

       Option "ShadowPrimary" "boolean"
              This option enables a so-called "shadow primary" buffer  for  fast  CPU  access  to
              pixel  data, and separate scanout buffers for each display controller (CRTC).  This
              may improve performance for some 2D workloads, potentially at the expense of  other
              (e.g. 3D, video) workloads.  Note in particular that enabling this option currently
              disables page flipping.  The default is off.

       The following driver Options are supported for EXA :

       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

       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 or when fast fb feature is  enabled
              for RS690/RS780/RS880.

       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.


       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