Date: Mon, 30 Jun 2003 08:37:25 -0700
From: Stephen Hemminger <shemminger@osdl.org>
To: Chris Friesen <cfriesen@nortelnetworks.com>
Cc: paulus@samba.org, linux-kernel@vger.kernel.org, linux-ppp@vger.kernel.org
Subject: Re: [BUG]:   problem when shutting down ppp connection since 2.5.70
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On Mon, 30 Jun 2003 10:02:42 -0400
Chris Friesen <cfriesen@nortelnetworks.com> wrote:

> Paul Mackerras wrote:
> 
> > Is this the user-mode pppoe or the in-kernel pppoe?  IOW, are you
> > using the pppoe channel type, or do you have the usermode program that
> > runs pppd behind a pty?
> 
> I believe its the Roaring Penguin usermode one.  I'm fairly sure PPPOE 
> isn't enabled in the kernel.  I'm at work now, so it'll have to wait 
> till this evening to make sure.
> 
> > And, do you have any TCP connections open over the link when you take
> > it down?
> 
> On at least some of the occasions there should have been no connections 
> open as the machine had just booted and the first thing I did after X 
> came up was to shutdown adsl.
> 
> > What version of pppd is it?
> 
> Not sure--will check later.  Pretty sure its Mandrake 9 default.
> 
> > Has anyone been able to replicate this without using pppoe?  The type
> > of channel shouldn't make any difference, but I just tried ppp over a
> > pty and it worked fine (except that Deflate is broken, but that's
> > another problem).
> 
> Note that I can only reliably reproduce it if the dsl connection is 
> brought up at init time.  If I don't bring it up automatically at init 
> but manually bring it up later, the problem doesn't seem to occur.
> 
> Chris

PPP did have problems keeping track of the tty until the latest round
if fixes (2.5.73+).  The ppp_async module wasn't using owner fields as
reqired.


 Also, see if bringing down the ppp connection with ifconfig
before attempting the rmmod helps. i.e.
	ifconfig ppp0 down
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