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v4l-conf(8)		    System Manager's Manual		   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 trou-
       ble-shooting.  v4l-conf must be installed suid-root.

       v4l-conf	knows three ways to get	the informations:

	* Query	the X-Server using the XF86 DGA	extension.  This  is  the  de-
	  fault	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 exam-
	   ple.

       -p pitch
	   Set framebuffer pitch to pitch bytes.  The value should  be	speci-
	   fied	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  MER-
       CHANTABILITY  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)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | BUGS | SEE ALSO | AUTHOR | COPYRIGHT

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