From mboxrd@z Thu Jan  1 00:00:00 1970
From: DervishD <udev@dervishd.net>
Date: Wed, 28 Feb 2007 12:45:27 +0000
Subject: Re: Loading modules on demand with /sbin/hotplug
Message-Id: <20070228124526.GA2498@DervishD>
List-Id: <linux-hotplug.vger.kernel.org>
References: <20070227172320.GA10176@DervishD>
In-Reply-To: <20070227172320.GA10176@DervishD>
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To: linux-hotplug@vger.kernel.org

    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=3D"pty*",      OPTIONS+=3D"ignore_device"
KERNEL=3D"tty[a-z]*", OPTIONS+=3D"ignore_device"

KERNEL=3D"tty",  GROUP=3D"tty"
KERNEL=3D"vcs",  GROUP=3D"tty"
KERNEL=3D"vcsa", GROUP=3D"tty"

KERNEL=3D"hda1", GROUP=3D"disk", MODE=3D"660", SYMLINK+=3D"root"
KERNEL=3D"hdb1", GROUP=3D"disk", MODE=3D"660", SYMLINK+=3D"ubuntu"
KERNEL=3D"hdb2", GROUP=3D"disk", MODE=3D"660", SYMLINK+=3D"swap"

KERNEL=3D"full", MODE=3D"222"=20
KERNEL=3D"null", MODE=3D"666"
KERNEL=3D"zero", MODE=3D"444"

KERNEL=3D"random", MODE=3D"444"
KERNEL=3D"urandom", MODE=3D"444"

SUBSYSTEM=3D"usb_endpoint", OPTIONS+=3D"ignore_device"

SUBSYSTEM=3D"mem", GROUP=3D"kmem"

SUBSYSTEM=3D"usb_device", ATTRS{serial}=3D"5B6B0990DFC6", NAME=3D"pendrive"

#ACTION=3D"add", ENV{MODALIAS}=3D"?*", RUN=3D"/sbin/modprobe $env{MODALIAS}"
#ACTION=3D"remove", ENV{MODALIAS}=3D"?*", RUN=3D"/sbin/modprobe -r $env{MOD=
ALIAS}"

RUN+=3D"/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:)

    Ra=FAl N=FA=F1ez de Arenas Coronado

--=20
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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