Re: Loading modules on demand with /sbin/hotplug

[DervishD <udev@dervishd.net>]

    Hi Kay :)

 * Kay Sievers <kay.sievers@vrfy.org> dixit:
> If you find MODALIAS in the environment, just run /sbin/modprobe with
> a RUN rule and almost all needed modules should get auto-loaded. There
> are only a few exceptions for exotic subsystems.

    I've done this and now the systems hangs up at bootup. I can't find
any information in any log, so I don't know the cause (probably modprobe
caused some driver to load, which caused an udev event, which caused
modprobe to run again, causing an infinite loop).

    At boot time I mount sysfs, load udevd, launch udevtrigger and
udevsettle and after that, the rest of services of my system (I use my
own init, so the boot scheme is a bit different, but not that much). The
services are launched OK.

    In my rules file I have this:

KERNEL="pty*",      OPTIONS+="ignore_device"
KERNEL="tty[a-z]*", OPTIONS+="ignore_device"

KERNEL="tty",  GROUP="tty"
KERNEL="vcs",  GROUP="tty"
KERNEL="vcsa", GROUP="tty"

KERNEL="hda1", GROUP="disk", MODE="660", SYMLINK+="root"
KERNEL="hdb1", GROUP="disk", MODE="660", SYMLINK+="ubuntu"
KERNEL="hdb2", GROUP="disk", MODE="660", SYMLINK+="swap"

KERNEL="full", MODE="222" 
KERNEL="null", MODE="666"
KERNEL="zero", MODE="444"

KERNEL="random", MODE="444"
KERNEL="urandom", MODE="444"

SUBSYSTEM="usb_endpoint", OPTIONS+="ignore_device"

SUBSYSTEM="mem", GROUP="kmem"

SUBSYSTEM="usb_device", ATTRS{serial}="5B6B0990DFC6", NAME="pendrive"

#ACTION="add", ENV{MODALIAS}="?*", RUN="/sbin/modprobe $env{MODALIAS}"
#ACTION="remove", ENV{MODALIAS}="?*", RUN="/sbin/modprobe -r $env{MODALIAS}"

RUN+="/usr/sbin/hal &>> /tmp/hal.log"

-----------------------------

    The two commented lines are the ones that caused the problem. Any
idea about the possible causes? If I move the modprobe command to my
"hal" script (IT IS NOT freedesktop HAL, but my own script), the problem
is the same: the system hangs as soon as the booting process finishes,
and I don't have any evidence of modprobe being hung or whatever.

    I think I'm missing something VERY simple here, but I can't see
what: have you any idea about which the problem may be? Should I delete
the second commented line and don't unload modules on demand? May any of
the commented lines be causing an infinite loop?

    Thanks a lot in advance and sorry for bothering you with this kind
of questions. If I'm crossing the line, please tell O:)

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
It's my PC and I'll cry if I want to... RAmen!

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