s3virge

s3virge(4)                  Kernel Interfaces Manual                  s3virge(4)



NAME
       s3virge - S3 ViRGE video driver

SYNOPSIS
       Section "Device"
         Identifier "devname"
         Driver "s3virge"
         ...
         [ Option "optionname" ["optionvalue"]]
       EndSection

DESCRIPTION
       s3virge is an Xorg driver for S3 based video cards.  The driver is fully
       accelerated, and provides support for the following framebuffer depths:
       8, 15, 16, and 24.  All visual types are supported for depth 8, and
       TrueColor visuals are supported for the other depths.  XVideo hardware up
       scaling is supported in depth 16 and 24 on the DX, GX, GX2, MX, MX+, and
       Trio3D/2X.  Doublescan modes are supported and tested in depth 8 and 16
       on DX, but disable XVideo.  Doublescan modes on other chipsets are
       untested.

SUPPORTED HARDWARE
       The s3virge driver supports PCI and AGP video cards based on the
       following S3 chips:

       ViRGE       86C325

       ViRGE VX    86C988

       ViRGE DX    86C375

       ViRGE GX    86C385

       ViRGE GX2   86C357

       ViRGE MX    86C260

       ViRGE MX+   86C280

       Trio 3D     86C365

       Trio 3D/2X  86C362, 86C368

CONFIGURATION DETAILS
       Please refer to xorg.conf(5) for general configuration details.  This
       section only covers configuration details specific to this driver.  All
       options names are case and white space insensitive when parsed by the
       server, for example,  "virge vx" and "VIRGEvx" are equivalent.

       The driver auto-detects the chipset type, but the following ChipSet names
       may optionally be specified in the config file ""Device"" section, and
       will override the auto-detection:

           "virge", "86c325", "virge vx", "86c988", "virge dx", "86c375", "virge
           gx", "86c385", "virge gx2", "86c357", "virge mx", "86c260", "virge
           mx+", "86c280", "trio 3d", "86c365", "trio 3d/2x", "86c362",
           "86c368".


       The following Cursor Options are supported:

       Option "HWCursor" ["boolean"]
              Enable or disable the HW cursor.  Default: on.

       Option "SWCursor" ["boolean"]
              Inverse of "HWCursor".  Default: off.


       The following display Options are supported:

       Option "ShadowFB" ["boolean"]
              Use shadow framebuffer.  Disables HW acceleration.  Default: off.

       Option "Rotate" "cw | ccw"
              Rotate the screen CW - clockwise or CCW - counter clockwise.
              Disables HW Acceleration and HW Cursor, uses ShadowFB.  Default:
              no rotation.

       Option "XVideo" ["boolean"]
              Disable XVideo support by using the off option.  This changes FIFO
              settings which prevent screen noise for high-res modes.  Default:
              on


       The following video memory Options are supported:

       Option "slow_edodram"
              Switch the standard ViRGE to 2-cycle edo mode. Try this if you
              encounter pixel corruption on the ViRGE. Using this option will
              cause a large decrease in performance.  Default: off.

       Option "fpm_vram"
              Switch the ViRGE/VX to fast page mode vram mode.  Default: off.

       Option "slow_dram | fast_dram"
              Change Trio 3D and 3D/2X memory options.  Default: Use BIOS
              defaults.

       Option "early_ras_precharge | late_ras_precharge"
              adjust memory parameters.  One of these will us the same settings
              as your video card defaults, and using neither in the config file
              does the same.  Default: none.

       Option "set_mclk" "integer"
              sets the memory clock, where integer is in kHz, and integer <=
              100000.  Default: probe the memory clock value, and use it at
              server start.

       Option "set_refclk" "integer"
              sets the ref clock for ViRGE MX, where integer is in kHz.
              Default: probe the memory clock value, and use it at server start.



       The following acceleration and graphics engine Options are supported:

       Option "NoAccel"
              Disable acceleration.  Very useful for determining if the driver
              has problems with drawing and acceleration routines.  This is the
              first option to try if your server runs but you see graphic
              corruption on the screen.  Using it decreases performance, as it
              uses software emulation for drawing operations the video driver
              can accelerate with hardware.  Default: acceleration is enabled.

       Option "UseFB"
              There are two framebuffer rendering methods.  fb and cfb.  Both
              are available in the driver.  fb is the newer and default method.
              To switch back to cfb use this option with no, off or other
              negative parameter.  Default: on.

       Option "fifo_aggressive | fifo_moderate | fifo_conservative"
              alter the settings for the threshold at which the pixel FIFO takes
              over the internal memory bus to refill itself. The smaller this
              threshold, the better the acceleration performance of the card.
              You may try the fastest setting (fifo_aggressive) and move down if
              you encounter pixel corruption.  The optimal setting will probably
              depend on dot-clock and on color depth. Note that specifying any
              of these options will also alter other memory settings which may
              increase performance, so trying fifo_conservative will in most
              cases be a slight benefit (this uses the chip defaults).  If pixel
              corruption or transient streaking is observed during drawing
              operations then removing any fifo options is recommended.
              Default: none.


       The following PCI bus Options are supported:

       Option "pci_burst" ["boolean"]
              will enable PCI burst mode. This should work on all but a few
              broken PCI chipsets, and will increase performance.  Default: off.

       Option "pci_retry" ["boolean"]
              will allow the driver to rely on PCI Retry to program the ViRGE
              registers.  pci_burst must be enabled for this to work.  This will
              increase performance, especially for small fills/blits, because
              the driver does not have to poll the ViRGE before sending it
              commands to make sure it is ready. It should work on most recent
              PCI chipsets.  Default: off.

       The following ViRGE MX LCD Options are supported:

       Option "lcd_center"

       Option "set_lcdclk" "integer"
              allows setting the clock for a ViRGE MX LCD display.  integer is
              in Hz.  Default: use probed value.


       The following additional Options are supported:

       Option "ShowCache" ["boolean"]
              Enable or disable viewing offscreen cache memory.  A development
              debug option.  Default: off.

       Option "mx_cr3a_fix" ["boolean"]
              Enable or disable a cr3a fix added for ViRGE MX.  Default: on.


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


KNOWN BUGS
       The VideoRam generic driver parameter is presently ignored by the s3virge
       driver.  On PPC this is reported to cause problems for 2M cards, because
       they may autodetect as 4M.


SUPPORT
       For assistance with this driver, or XFree86 in general, check the XFree86
       web site at http://www.xfree86.org.  A FAQ is available on the web site
       at http://www.xfree86.org/FAQ/.  If you find a problem with XFree86 or
       have a question not answered in the FAQ please use our bug report form
       available on the web site or send mail to XFree86@XFree86.org.  When
       reporting problems with the driver send as much detail as possible,
       including chipset type, a server output log, and operating system
       specifics.


AUTHORS
       Kevin Brosius, Matt Grossman, Harald Koenig, Sebastien Marineau, Mark
       Vojkovich.



X Version 11                xf86-video-s3virge 1.10.7                 s3virge(4)