[linux-dvb] 2.6.3 dvb modprobe

[Achim Löbbert <aloebbert@gmx.de>]

Hello,

using vanilla kernel 2.6.3 and Hauppauge Nexus-s Rev. 2.2 I like to
automatically load the dvb modules using /lib/modules/modprobe.conf:

alias char-major-81 dvb-ttpci
alias char-major-250 dvb-ttpci
alias /dev/dvb/* dvb-ttpci
alias /dev/dvb/adapter0/* dvb-ttpci
alias /dev/video* dvb-ttpci
install dvb-ttpci /sbin/modprobe --ignore-install dvb-ttpci; \
                  /sbin/modprobe stv0299

With the above I can load the 1.1.0 modules and start the Debian sid
vdr-daemon as root like this:

$ modprobe dvb-ttpci
$ lsmod
Module                  Size  Used by
evdev                   9344  0
stv0299                10884  0
dvb_ttpci              80524  0
dvb_core               58772  2 stv0299,dvb_ttpci
saa7146_vv             49792  1 dvb_ttpci
video_buf              20612  1 saa7146_vv
saa7146                19108  2 dvb_ttpci,saa7146_vv
v4l1_compat            14468  1 saa7146_vv
v4l2_common             6400  1 saa7146_vv
videodev                9600  1 saa7146_vv
firmware_class          9088  1 dvb_ttpci
crc32                   4608  2 dvb_ttpci,dvb_core
ttpci_eeprom            3072  1 dvb_ttpci
...                      ...  . ...

$ /etc/init.d/vdr start   -> fine.
$ xawtv -c /dev/video0    -> works ok
$ kvdr                    -> works as well. So far so good.

But when I omit the initial modprobe "dvb-ttpci" while the modules are
not yet loaded then "strace vdr-kbd -c /etc/vdr" gives:

access("/dev/dvb/adapter0/frontend0", F_OK) = 0
open("/dev/dvb/adapter0/frontend0", O_RDONLY) = -1 ENODEV (No such device)

and "strace xawtv -c /dev/video" similarily:

open("/dev/video", O_RDWR|O_LARGEFILE)  = -1 ENODEV (No such device)

Probably my understanding of /dev/video0 (v4l) and /dev/dvb/adapter0
(v4l2) is insufficient, but according to the above aliases in
/lib/modules/modprobe.conf it should load the modules on demand, but
doesn't.

Or am I asking too much for auto-loading of the modules when the
device files are opened by the application?

-- 
Achim Löbbert - aloebbert@gmx.de


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