Re: [Fwd: Re: Hotplug *seems* to hang during boot]]

Re: [Fwd: Re: Hotplug *seems* to hang during boot]]

[Dave Dodge]

On Tue, Oct 05, 2004 at 07:45:14PM +0000, Richard Wild wrote:
> and this way I discovered that it seems to go wrong when it tries to do 
> this:
> 
>    modprobe -q -s ehci-hcd

I believe that's for USB 2.0.

Googling for "echi-hcd hang" I see someone reporting a similar problem
last year, with possible workaround:

  http://lists.suse.com/archive/suse-linux-e/2003-Aug/2522.html

                                                  -Dave Dodge


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[Fwd: Re: Hotplug *seems* to hang during boot]]

[Richard Wild]

All,

on the advice of Patrick Mansfield (thanks) I invoked the script like this:

    sh -x /etc/rc.d/rc.hotplug start

and this way I discovered that it seems to go wrong when it tries to do 
this:

    modprobe -q -s ehci-hcd

At the moment I'm not familiar with that kernel module.  Will keep you 
posted.

Thanks,
Rich.

-------- Original Message --------
Subject: 	Re: Hotplug *seems* to hang during boot]
Date: 	Mon, 04 Oct 2004 22:35:31 +0000
From: 	Richard Wild <richard-wild@ntlworld.com>
To: 	Simone Gotti <simone.gotti@email.it>
CC: 	linux-hotplug-devel@lists.sourceforge.net
References: 	<4161A0FF.9010509@ntlworld.com> 
<20041004195531.GA20448@basmati> <4161C17B.80701@ntlworld.com> 
<200410042316.26380.simone.gotti@email.it>



Hi,

I had that thought myself immediately after posting.  I went through the 
various scripts putting echo statements in and eventually arrived at 
/etc/hotplug/pci.agent with the line:

   load_drivers pci $MAP_CURRENT "$LABEL"

which expands to:

   load_drivers pci /lib/modules/2.6.7/modules.pcimap PCI slot

That's where it seems to go off the trolley.  I will post more if and 
when I find it.

Thanks,
Rich.

Simone Gotti wrote:

> You can try editing the /etc/hotplug/hotplug.functions and uncomment 
> the line
>
># DEBUG=yes; export DEBUG
>
>so you can at least see in which part or on which module it's blocking. and if 
>it's a kernel problem.
>
>P.S. I don't use slackware from a lot of time, but I thing that you can look 
>if you are using the latest hotplug (20040923) or install it.
>If this don't work you can also try to apply the patches that you can find in 
>debian (I hope to have time to dig in them and send them splitted to this 
>list, so also the gentoo's and other distro users can use them).
>
>Bye!
>  
>



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Re: [Fwd: Re: Hotplug *seems* to hang during boot]]

[Richard Wild]

Turning acpi off did not work for me. I will go and get a better kernel, 
and also try the latest hotplug as Simone suggested.

Rich.

Dave Dodge wrote:

> I believe that's for USB 2.0.
>
>Googling for "echi-hcd hang" I see someone reporting a similar problem
>last year, with possible workaround:
>
>  http://lists.suse.com/archive/suse-linux-e/2003-Aug/2522.html
>
>                                                  -Dave Dodge
>


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Re: [Fwd: Re: Hotplug *seems* to hang during boot]]

[Patrick Mansfield]

Rich -

On Tue, Oct 05, 2004 at 09:02:59PM +0000, Richard Wild wrote:
> Turning acpi off did not work for me. I will go and get a better kernel, 
> and also try the latest hotplug as Simone suggested.

Seems doubtful it is a hotplug problem if the module load is hanging your
system.

Have you seen the REPORTING-BUGS file?

Testing 2.6.9-rc3 and 2.6.8.1 might help. You should followup on
linux-usb-devel. google based on your hardware for other failure reports, and
also search usb-devel for your hardware, here is a decent archive:

http://news.gmane.org/gmane.linux.usb.devel

usb-devel will want lspci -v output, see the kernel source REPORTING-BUGS
for details.

And maybe try getting sysrq process trace output, assuming the system is
not absolutely dead,  see kernel's Documentation/syrq.txt, here is current
bk version online:

http://linux.bkbits.net:8080/linux-2.5/anno/Documentation/sysrq.txt@1.9?nav=index.html|src/|src/Documentation

The above might require a serial line to capture the relevant details.

Have fun.

-- Patrick Mansfield


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Re: [Fwd: Re: Hotplug *seems* to hang during boot]]

[Richard Wild]

>Seems doubtful it is a hotplug problem if the module load is hanging your
>system.
>  
>
Yes I take your point fully, and having established this I will take my 
problem off the hotplug developers' mailing list.

>Have you seen the REPORTING-BUGS file?
>
>Testing 2.6.9-rc3 and 2.6.8.1 might help. You should followup on
>linux-usb-devel. google based on your hardware for other failure reports, and
>also search usb-devel for your hardware, here is a decent archive:
>  
>
Thanks. I am attempting to get 2.6.9-rc3 to work now (getting kernel 
panics atm about filesystems).

>And maybe try getting sysrq process trace output, assuming the system is
>not absolutely dead,  see kernel's Documentation/syrq.txt, here is current
>bk version online:
>
>http://linux.bkbits.net:8080/linux-2.5/anno/Documentation/sysrq.txt@1.9?nav=index.html|src/|src/Documentation
>
>The above might require a serial line to capture the relevant details.
>  
>
I will look into that if I feel like a challenge! (That's new to me). :)

Thanks everyone for your help.

Rich.


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