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RENDITION(4)               Kernel Interfaces Manual               RENDITION(4)



NAME
       rendition - Rendition video driver

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

DESCRIPTION
       rendition  is  an  Xorg  driver for Rendition/Micron based video cards.
       The driver supports following framebuffer depths: 8, 15  (Verite  V1000
       only),  16  and  24. Acceleration and multi-head configurations are not
       supported yet, but are work in progress.

SUPPORTED HARDWARE
       The rendition driver supports PCI and AGP video cards based on the fol-
       lowing Rendition/Micron chips:

       V1000       Verite V1000 based cards.

       V2100       Verite  V2100  based  cards. Diamond Stealth II S220 is the
                   only known such card.

       V2200       Verite V2200 based cards.

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

       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:

           "v1000", "v2x00".

       The  driver will auto-detect the amount of video memory present for all
       chips. If the amount of memory  is  detected  incorrectly,  the  actual
       amount of video memory should be specified with a VideoRam entry in the
       config file "Device" section.

       The following driver Options are supported:

       Option "SWCursor" "boolean"
              Disables use of the hardware cursor. Default: use HW-cursor.

       Option "OverclockMem" "boolean"
              Increases  the  Mem/Sys  clock  to  125MHz/60MHz  from  standard
              110MHz/50MHz.  Default: Not overclocked.

       Option "DacSpeed" "MHz"
              Run the memory at a higher clock. Useful on some cards with dis-
              play glitches at higher resolutions. But adds the risk to damage
              the hardware. Use with caution.

       Option "FramebufferWC" "boolean"
              If  writecombine is disabled in BIOS, and you add this option in
              configuration file, then the driver will try to  request  write-
              combined   access  to  the  framebuffer.  This  can  drastically
              increase the performance on unaccelerated server. Requires  that
              "MTRR"-support  is  compiled  into the OS-kernel.  Default: Dis-
              abled for V1000, enabled for V2100/V2200.

       Option "NoDDC" "boolean"
              Disable probing  of  DDC-information  from  your  monitor.  This
              information  is not used yet and is only there for informational
              purposes.  Safe to disable if  you  experience  problems  during
              startup of X-server.  Default: Probe DDC.

       Option "ShadowFB" "boolean"
              If  this  option is enabled, the driver will cause the CPU to do
              each drawing operation first into a shadow frame buffer in  sys-
              tem  virtual  memory and then copy the result into video memory.
              If this option is not active, the CPU will  draw  directly  into
              video memory.  Enabling this option is beneficial for those sys-
              tems where reading from video memory is, on average, slower than
              the  corresponding read/modify/write operation in system virtual
              memory.  This is normally the case for PCI or AGP adapters, and,
              so,  this  option  is  enabled by default unless acceleration is
              enabled.  Default: Enabled unless acceleration is used.

       Option "Rotate" "CW"

       Option "Rotate" "CCW"
              Rotate the display clockwise or counterclockwise.  This mode  is
              unaccelerated.  Default: no rotation.


       Notes  For  the moment the driver defaults to not request write-combine
              for any chipset as there has been indications of  problems  with
              it.  Use Option "MTRR" to let the driver request write-combining
              of memory access on the video board.

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

AUTHORS
       Authors include: Marc Langenbach, Dejan Ilic



X Version 11              xf86-video-rendition 4.2.0              RENDITION(4)