Provided by: v4l-conf_3.103-3build1_amd64 bug


       v4l-conf -  configure a video4linux driver


       v4l-conf [ options ]


       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.


       -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.


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


       xawtv(1), fbtv(1)


       Gerd Knorr <>


       Copyright (C) 1997-99 Gerd Knorr <>

       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,

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