rendition(4) - NetBSD Manual Pages

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RENDITION(4)                                                      RENDITION(4)




NAME

       rendition - Rendition video driver


SYNOPSIS

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


DESCRIPTION

       rendition  is an XFree86 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 XF86Config(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. This might change before final  XFree86  4.0  release.
              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

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


AUTHORS

       Authors include: Marc Langenbach, Dejan Ilic



4.4.0                               XFree86                       RENDITION(4)