MirOS Manual: savage(4)


SAVAGE(4)           UNIX Programmer's Manual            SAVAGE(4)

NAME

     savage - S3 Savage video driver

SYNOPSIS

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

DESCRIPTION

     savage is an XFree86 driver for the S3 Savage family video
     accelerator chips.  The savage driver supports PCI and AGP
     boards with the following chips:

     Savage3D        (8a20 and 8a21)

     Savage4         (8a22)

     Savage2000      (9102)

     Savage/MX       (8c10 and 8c11)

     Savage/IX       (8c12 and 8c13)

     ProSavage PM133 (8a25)

     ProSavage KM133 (8a26)

     Twister (ProSavage PN133)
                     (8d01)

     TwisterK (ProSavage KN133)
                     (8d02)

     ProSavage DDR   (8d03)

     ProSavage DDR-K (8d04)

CONFIGURATION DETAILS

     Please refer to XF86Config(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 cursor.  If the SWCursor option is specified,
          any HWCursor setting is ignored.  Thus, either

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          "HWCursor off" or "SWCursor on" will force the use of
          the software cursor.  On Savage/MX and Savage/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 "Rotate" "CW"

     Option "Rotate" "CCW"
          Rotate the desktop 90 degrees clockwise or counter-
          clockwise.  This option forces the ShadowFB option on,
          and disables acceleration. 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 pro-
          duce incorrect results if they are driven at too fast
          of a frequency.  If UseBIOS is on, the BIOS will usu-
          ally restrict the clock to the correct range.  If not,
          it might be necessary to override it here.  The fre-
          quency 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 "UseBIOS" "boolean"
          Enable or disable use of the video BIOS to change
          modes.  Ordinarily, the savage driver tries to use the
          video BIOS to do mode switches.  This generally pro-
          duces 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 XF86Config 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.
          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

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          dragging windows.  The bug affects about 4% of all
          Savage users.  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.  Default: off (use normal status
          register).

FILES

     savage_drv.o

SEE ALSO

     XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

AUTHORS

     Authors include Tim Roberts (timr@probo.com) and Ani Joshi
     (ajoshi@unixbox.com) for the 4.0 version, and Tim Roberts
     and S. Marineau for the 3.3 driver from which this was
     derived.

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