Re: Coldpluging or USB Issues ?

[Greg KH <greg@kroah.com>]

On Fri, May 12, 2006 at 03:09:18PM +0300, Razvan Gavril wrote:
> Greg KH wrote:
> >On Thu, May 11, 2006 at 11:25:05AM +0300, Razvan Gavril wrote:
> >  
> >>As far as i know since 2.6.15 there is a new coldplug mechanism using 
> >>uevent and switching to a newer version of udevd that can do the cold 
> >>plugging and replacing the old hotplug scripts would be the natural next 
> >>step but before doing this i need to ask some questions like :
> >>1) Where there any changes sine 2.6.15 that could cause the old hotplug 
> >>scripts to work reliable because most part of the time (95%) they are 
> >>working ?
> >>    
> >
> >I don't know, what is failing?
> >
> >  
> Sometimes if fails to load the modules for the usb devices at boot but 
> there are no step to reproduce, looks totally random and only on rare 
> occasions if failing.

I have not heard of this problem before, nor can I think of anything
that has changed to affect this.

But those hotplug scripts are old and crufty and not really supported by
anyone anymore.

> >>2) Upgrading to newer version of udevd to let the udev scripts to do 
> >>the coldpluging can solve any issues that where described ?
> >>    
> >
> >Probably, that's what all of the major distros have already done.  It
> >makes the startup logic much smaller and simpler.
> >
> >This should be continued on the linux-hotplug-devel mailing list if you
> >are interested.
> I know that most major distros made the switch, but does anything 
> changed so it would make debian's hotplug scripts (and i don't thing 
> they are only used on debian) incompatible with kernels greater than 
> 2.6.15 ?

Why not ask the Debian maintainer of these scripts.  I'm sure that a lot
of Debian users still use them without udev.

> I cannot risk to upgrade to udev and have the same unstable platform.
> The most secure option that i have now is going back to 2.6.13 if udev
> can't give me a satisfactory answer.
> 
> PS: I can't find any mailing list named linux-hotplug-devel as i would 
> be more that happy to move my mail there.

http://www.google.com/search?q=linux-hotplug-devel+mailing+list second
hit shows the mailman interface to sign up or send mail to it.

thanks,

greg k-h