Provided by: xserver-xorg-video-voodoo_1.2.4-2build2_amd64 bug


       voodoo - Voodoo video driver


       Section "Device"
         Identifier "devname"
         Driver "voodoo"


       voodoo is an Xorg driver for Voodoo 1 and Voodoo 2 series video adapters.  On the Voodoo 1
       the driver uses a shadow buffer in  system  memory  as  the  video  adapter  has  only  3D
       acceleration.  Selected  portions  of  the shadow framebuffer are copied out to the Voodoo
       board at the right time. Because of this, the speed of the driver is very dependent on the
       CPU. Processors nowadays are actually rather fast at moving data so we get very good speed
       anyway as the shadow framebuffer is in cached RAM.

       The Voodoo2 has 16bpp acceleration and the driver provides accelerated  versions  of  most
       operations  except  angled  lines and stipples. Accelerated alpha blending with the Render
       extension is also supported as is DGA.

       This driver supports 16bpp modes currently. The video hardware supports  image  conversion
       from 24bpp to 16bpp but the hardware is 16bpp only.

       The  Voodoo  1  series  cards can go up to 800x600 resolution while the Voodoo 2 can reach
       1024x768 providing it has at least 2Mb of frame buffer memory. 1024x768 2D mode  does  not
       require two cards configured in scan-line interleave mode (SLI).

       Multihead and Xinerama configurations are supported. SLI configurations will be treated as
       multiple video cards.

       Limited support for DPMS screen saving is available. The "standby" and "suspend" modes are
       just  painting  the screen black. The "off" mode turns the Voodoo board off and thus works

       This driver does not support a virtual screen size different from the display  size.  This
       is a hardware limitation. 3D rendering is also not supported.


       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 "ShadowFB" "boolean"
              Enables a shadow buffer in  main  memory.  This  turns  off  acceleration  but  for
              otherwise  unaccelerated  operations  can improve performance materially.  Default:
              off for voodoo2, on for voodoo1.

       Option "NoAccel" "boolean"
              Disables acceleration if set. Unless debugging this option should only  be  set  if
              ShadowFB is enabled.  Default: off for voodoo2, on for voodoo1.


       The  driver  interacts  badly  with the sstfb frame buffer driver as there is insufficient
       information to restore the chip to its previous state.


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


       Authors: Alan Cox, Ghozlane Toumi, Henrik Harmsen.