savage - S3 Savage video driver


       Section "Device"
         Identifier "devname"
         Driver "savage"


       savage  is  an  Xorg  driver for the S3 Savage family video accelerator
       chips.  2D, 3D, and Xv acceleration is supported on  all  chips  except
       the  Savage2000  (2D only).  Dualhead operation is supported on MX, IX,
       and SuperSavage chips.  The savage driver supports PCI and  AGP  boards
       with the following chips:

       Savage3D        (8a20 and 8a21) (2D, 3D)

       Savage4         (8a22) (2D, 3D)

       Savage2000      (9102) (2D only)

       Savage/MX       (8c10 and 8c11) (2D, 3D, Dualhead)

       Savage/IX       (8c12 and 8c13) (2D, 3D, Dualhead)

       SuperSavage/MX  (8c22, 8c24, and 8c26) (2D, 3D, Dualhead)

       SuperSavage/IX  (8c2a, 8c2b, 8c2c, 8c2d, 8c2e, and 8c2f) (2D, 3D, Dual-

       ProSavage PM133 (8a25) (2D, 3D)

       ProSavage KM133 (8a26) (2D, 3D)

       Twister (ProSavage PN133)
                       (8d01) (2D, 3D)

       TwisterK (ProSavage KN133)
                       (8d02) (2D, 3D)

       ProSavage DDR   (8d03) (2D, 3D)

       ProSavage DDR-K (8d04) (2D, 3D)


       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 "HWCursor" "boolean"

       Option "SWCursor" "boolean"
              These  two options interact to specify hardware or software cur-
              sor.  If the SWCursor option is specified, any HWCursor  setting
              is  ignored.   Thus, either "HWCursor off" or "SWCursor on" will
              force the use of the software cursor.   On  Savage/MX  and  Sav-
              age/IX chips which are connected to LCDs, a software cursor will
              be forced, because the Savage hardware cursor does not correctly
              track  the automatic panel expansion feature.  Default: hardware

       Option "NoAccel" "boolean"
              Disable  or  enable  acceleration.   Default:  acceleration   is
              enabled.   TP  Option  "AccelMethod"  "string"  Chooses  between
              available acceleration architectures.  Valid options are XAA and
              EXA.   XAA is the traditional acceleration architecture and sup-
              port for it is very stable.  EXA is a newer acceleration  archi-
              tecture  with  better  performance  for the Render and Composite
              extensions, but the rendering code for it is newer and  possibly
              unstable.  The default is XAA.

       Option "Rotate" "CW"

       Option "Rotate" "CCW"
              Rotate  the  desktop  90  degrees clockwise or counterclockwise.
              This option forces the ShadowFB option on, and disables acceler-
              ation.  Default: no rotation.

       Option "ShadowFB" "boolean"
              Enable  or  disable  use  of the shadow framebuffer layer.  This
              option disables acceleration.  Default: off.

       Option "LCDClock" "frequency"
              Override the maximum dot clock.  Some LCD panels produce  incor-
              rect  results if they are driven at too fast of a frequency.  If
              UseBIOS is on, the BIOS will usually restrict the clock  to  the
              correct  range.   If  not,  it might be necessary to override it
              here.  The frequency parameter may be specified as an integer in
              Hz  (135750000), or with standard suffixes like "k", "kHz", "M",
              or "MHz" (as in 135.75MHz).

       Option "CrtOnly" "boolean"
              This option disables output to the LCD and enables output to the
              CRT  port only.  It is useful on laptops if you only want to use
              the CRT port or to force the CRT output only  on  desktop  cards
              that use mobile chips. Default: auto-detect active outputs

       Option "UseBIOS" "boolean"
              Enable  or disable use of the video BIOS to change modes.  Ordi-
              narily, the savage driver tries to use the video BIOS to do mode
              switches.   This  generally  produces  the best results with the
              mobile chips (/MX and /IX), since the BIOS knows how  to  handle
              the  critical but unusual timing requirements of the various LCD
              panels supported by the chip.  To do this, the  driver  searches
              through  the  BIOS  mode  list,  looking for the mode which most
              closely matches the xorg.conf mode line.  Some purists find this
              scheme  objectionable.   If  you  would  rather  have the savage
              driver use your mode line timing exactly, turn off  the  UseBios
              option.   Note:  Use of the BIOS is required for dualhead opera-
              tion.  Default: on (use the BIOS).

       Option "ShadowStatus" "boolean"
              Enables the use of a shadow status register.  There  is  a  chip
              bug in the Savage graphics engine that can cause a bus lock when
              reading the engine status register under  heavy  load,  such  as
              when  scrolling text or dragging windows.  The bug affects about
              4% of all Savage users without DRI and a large fraction of users
              with  DRI.   If your system hangs regularly while scrolling text
              or dragging windows, try turning this option on.  This  uses  an
              alternate  method of reading the engine status which is slightly
              more expensive, but avoids the problem.   When  DRI  is  enabled
              then  the  default  is  "on"  (use shadow status), otherwise the
              default is "off" (use normal status register).

       Option "DisableCOB" "boolean"
              Disables the COB (Command Overflow Buffer) on savage4 and  newer
              chips.  There is supposedly a HW cache coherency problem on cer-
              tain savage4 and newer chips that renders the  COB  useless.  If
              you are having problems with 2D acceleration you can disable the
              COB, however you will lose some  performance.   3D  acceleration
              requires  the  COB to work.  This option only applies to Savage4
              and newer chips.  Default: "off" (use COB).

       Option "BCIforXv" "boolean"
              Use the BCI to copy and reformat Xv pixel data.  Using  the  BCI
              for  Xv  causes  graphics  artifacts on some chips.  This option
              only applies to Savage4 and prosavage/twister  chips.   Default:
              on  for  prosavage and twister (use BCI for Xv); off for savage4
              (do not use the BCI for Xv).

       Option "AGPMode" "integer"
              Set AGP data transfer rate.  (used only when DRI is enabled)
              1      -- x1 (default)
              2      -- x2
              4      -- x4
              others -- invalid

       Option "AGPSize" "integer"
              The amount of AGP memory that will allocated for  DMA  and  tex-
              tures  in MB. Valid sizes are 4, 8, 16, 32, 64, 128 and 256. The
              default is 16MB.

       Option "DmaMode" "string"
              This option influences in which way DMA (direct  memory  access)
              is used by the kernel and 3D drivers.
              Any      -- Try command DMA first, then vertex DMA (default)
              Command  -- Only use command DMA or don't use DMA at all
              Vertex   -- Only use vertex DMA or don't use DMA at all
              None     -- Disable DMA
              Command and vertex DMA cannot be enabled at the same time. Which
              DMA mode is actually used in the end also  depends  on  the  DRM
              version  (only  >=  2.4.0 supports command DMA) and the hardware
              (Savage3D/MX/IX doesn't support command DMA).

       Option "DmaType" "string"
              The type of memory that will be used by the 3D  driver  for  DMA
              (direct memory access).
              PCI    -- PCI memory (default on PCI cards)
              AGP    -- AGP memory (default on AGP cards)
              "AGP" only works if you have an AGP card.

       Option "BusType" "string"
              The bus type that will be used to access the graphics card.
              PCI    -- PCI bus (default on PCI cards)
              AGP    -- AGP bus (default on AGP cards)
              "AGP" only works if you have an AGP card. If you choose "PCI" on
              an AGP card the AGP bus speed is not set and no AGP aperture  is
              allocated. This implies DmaType "PCI".




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


       Authors   include   Tim   Roberts   (   and   Ani  Joshi
       ( for this version, and Tim Roberts and S.  Marineau
       for the original driver from which this was derived.

X Version 11                xf86-video-savage 2.1.2                  SAVAGE(4)

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