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SAVAGE(4)                  Kernel Interfaces Manual                  SAVAGE(4)



NAME
       savage - S3 Savage video driver

SYNOPSIS
       Section "Device"
         Identifier "devname"
         Driver "savage"
         ...
       EndSection

DESCRIPTION
       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-
                       head)

       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)

CONFIGURATION DETAILS
       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
              cursor.

       Option "NoAccel" "boolean"
              Disable  or  enable  acceleration.   Default:  acceleration   is
              enabled.

       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, 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 and the RandR extension.  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".

       Option "DRI" "boolean"
              Enable DRI support.  This option allows you to enable or disable
              the DRI.  Default: "on" (enable DRI).

FILES
       savage_drv.o

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

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



X Version 11                xf86-video-savage 2.2.1                  SAVAGE(4)