1v4l-conf(8)                 System Manager's Manual                v4l-conf(8)
2
3
4

NAME

6       v4l-conf -  configure a video4linux driver
7

SYNOPSIS

9       v4l-conf [ options ]
10

DESCRIPTION

12       v4l-conf  is  a  small  helper tool.  It figures out the video mode and
13       framebuffer base  address  of  the  graphics  board  and  configures  a
14       video4linux driver like bttv.  This is needed for drivers which can DMA
15       the video over PCI directly into the video memory.
16
17       Usually it is not required  to  use  v4l-conf  manually,  xawtv(1)  and
18       fbtv(1)  run it automatically at startup.  It might be useful for trou‐
19       ble-shooting.  v4l-conf must be installed suid-root.
20
21       v4l-conf knows three ways to get the informations:
22
23        * Query the X-Server using  the  XF86  DGA  extension.   This  is  the
24          default if the DISPLAY environment variable is set.
25
26        * Query the framebuffer driver.  This is the default if DISPLAY is not
27          set.
28
29        * Query the console driver.  This is used on mklinux only.
30

OPTIONS

32       -h  Print a short description of all command line options.
33
34       -q  Be quiet.
35
36       -d dpy
37           Use the X11 display dpy to get the parameters.
38
39       -f  Use the framebuffer driver to get the parameters.
40
41       -c device
42           Set the video4linux device.
43
44       -b n
45           enforce n bpp color depth.  Works for switching between  15/16  and
46           24/32 bpp.
47
48       -s n
49           Shift the video display by n bytes.
50
51       -a adr
52           Set  framebuffer  address to adr.  The value should be specified in
53           hex.  This option is allowed for root only.   You  can't  overwrite
54           the  autodetected  value,  this switch is only useful if autodetect
55           doesn't work because the X-Server lacks DGA support.  You  can  put
56           this  into  /etc/conf.modules, as "post-install bttv ..." for exam‐
57           ple.
58
59       -p pitch
60           Set framebuffer pitch to pitch bytes.  The value should  be  speci‐
61           fied in decimal. Allowed for root only.
62

BUGS

64       Hope I haven't any security flaws in there.  If you find one, drop me a
65       note.  Mails with patches are preferred :-)
66

SEE ALSO

68       xawtv(1), fbtv(1)
69

AUTHOR

71       Gerd Knorr <kraxel@goldbach.in-berlin.de>
72

74       Copyright (C) 1997-99 Gerd Knorr <kraxel@goldbach.in-berlin.de>
75
76       This program is free software; you can redistribute it and/or modify it
77       under  the  terms of the GNU General Public License as published by the
78       Free Software Foundation; either version 2 of the License, or (at  your
79       option) any later version.
80
81       This  program  is  distributed  in the hope that it will be useful, but
82       WITHOUT ANY  WARRANTY;  without  even  the  implied  warranty  of  MER‐
83       CHANTABILITY  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
84       Public License for more details.
85
86       You should have received a copy of the GNU General Public License along
87       with this program; if not, write to the Free Software Foundation, Inc.,
88       675 Mass Ave, Cambridge, MA 02139, USA.
89
90
91
92                            (c) 1997-99 Gerd Knorr                 v4l-conf(8)
Impressum