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v4l-conf(8)


NAME

   v4l-conf -  configure a video4linux driver

SYNOPSIS

   v4l-conf [ options ]

DESCRIPTION

   v4l-conf  is  a  small  helper tool.  It figures out the video mode and
   framebuffer base  address  of  the  graphics  board  and  configures  a
   video4linux driver like bttv.  This is needed for drivers which can DMA
   the video over PCI directly into the video memory.

   Usually it is not required  to  use  v4l-conf  manually,  xawtv(1)  and
   fbtv(1)  run  it  automatically  at  startup.   It  might be useful for
   trouble-shooting.  v4l-conf must be installed suid-root.

   v4l-conf knows three ways to get the information:

    * Query the X-Server using  the  XF86  DGA  extension.   This  is  the
      default if the DISPLAY environment variable is set.

    * Query the framebuffer driver.  This is the default if DISPLAY is not
      set.

    * Query the console driver.  This is used on mklinux only.

OPTIONS

   -h  Print a short description of all command line options.

   -q  Be quiet.

   -d dpy
       Use the X11 display dpy to get the parameters.

   -f  Use the framebuffer driver to get the parameters.

   -c device
       Set the video4linux device.

   -b n
       enforce n bpp color depth.  Works for switching between  15/16  and
       24/32 bpp.

   -s n
       Shift the video display by n bytes.

   -a adr
       Set  framebuffer  address to adr.  The value should be specified in
       hex.  This option is allowed for root only.   You  can't  overwrite
       the  autodetected  value,  this switch is only useful if autodetect
       doesn't work because the X-Server lacks DGA support.  You  can  put
       this   into  /etc/conf.modules,  as  "post-install  bttv  ..."  for
       example.

   -p pitch
       Set  framebuffer  pitch  to  pitch  bytes.   The  value  should  be
       specified in decimal. Allowed for root only.

BUGS

   Hope I haven't any security flaws in there.  If you find one, drop me a
   note.  Mails with patches are preferred :-)

SEE ALSO

   xawtv(1), fbtv(1)

AUTHOR

   Gerd Knorr <kraxel@goldbach.in-berlin.de>

COPYRIGHT

   Copyright (C) 1997-99 Gerd Knorr <kraxel@goldbach.in-berlin.de>

   This program is free software; you can redistribute it and/or modify it
   under  the  terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2 of the License, or (at  your
   option) any later version.

   This  program  is  distributed  in the hope that it will be useful, but
   WITHOUT  ANY  WARRANTY;  without   even   the   implied   warranty   of
   MERCHANTABILITY  or  FITNESS  FOR  A  PARTICULAR  PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   675 Mass Ave, Cambridge, MA 02139, USA.

                        (c) 1997-99 Gerd Knorr                 v4l-conf(8)



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