Re: Hotplug

[MALET JL <malet.jean-luc@laposte.net>]

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Philip MacIver a écrit :

> --- MALET JL <malet.jean-luc@laposte.net> wrote: >
>Philip MacIver a écrit :
>  
>
>>>I've just read something that may be causing my
>>>problem with udev, and I would just like to confirm
>>>this before I actually go ahead and do any changes.
>>>      
>>>
>>>Running "/proc/sys/kernel/hotplug" on my system
>>>      
>>>
>>prints
>>    
>>
>>>out "/bin/true", I've read that to change this you
>>>      
>>>
>>do
>>    
>>
>>>echo "/sbin/hotplug" > /proc/sys/kernel/hotplug. 
>>>
>>>But what I want to know is, is this the reason that
>>>      
>>>
>>my
>>    
>>
>>>linux system won't boot up when I try and use udev
>>>with /dev as the udev_root. The reason that I ask
>>>      
>>>
>>is
>>    
>>
>>>because when I tested out udev using /udev as the
>>>udev_root and my system started up, the hotplug
>>>      
>>>
>>demon
>>    
>>
>>>started up after the hard disks are mounted. And
>>>      
>>>
>>the
>>    
>>
>>>problem was that the /dev/hda device nodes (and
>>>others) were not being created. 
>>>
>>>Thanks in advanced for any help. 
>>>
>>>=====
>>>Philip MacIver
>>>--
>>>e: pmaciver@arishi.com
>>>e: philipmaciver@yahoo.co.uk
>>> 
>>>
>>>      
>>>
>>what script do you use to start udev?  is this the
>>start_udev one?
>>    
>>
>
>Yes.
>
>  
>
>>when you use /udev : the entries are created? (do an
>>ls don't assume 
>>that they are created because no errors occurs)
>>    
>>
>
>Yes all the enteries are created, I've learnt never to
>assume
>  
>
>>are you mounting a /dev in fstab? (i know someone
>>that did that...)
>>
>>    
>>
>
>Nope I've checked my fstab many times and I don't
>mount a dev.
>
>When I do set the udev_root to /dev some devices get
>created, like fd0 and a few others that I can't
>remember. 
>
>But i'm wondering if where i'm starting udev in my
>rc.sysinit is the problem. Just for your reference I
>start it (and also mount sysfs) right after /proc gets
>mounted (and yes I do mmount sysfs before I run
>start_udev :) )
>
>
> 
>
>=====
>Philip MacIver
>--
>e: pmaciver@arishi.com
>e: philipmaciver@yahoo.co.uk
>
>
>	
>	
>		
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>  
>
I remember having such trouble but this was because the udev script was 
run twice...... but I can't remember exactly what was the causes and how 
they disapeard.....

what I remember is that : I loged into the box, noticed that /dev wasn't 
the right one (a fixed dev tree) so tried to rerun the script and only 
get a partial /dev structure.... looking what was mounted told me that 
/dev was mounted twice with ramfs..... maybe it can help :/

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